First search for dark matter annihilations in the Earth with the IceCube Detector

First search for dark matter annihilations in the Earth with the IceCube Detector

IceCube Collaboration: M. G. Aartsen\thanksrefAdelaide III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Abraham\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Ackermann\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Adams\thanksrefChristchurch III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. A. Aguilar\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Ahlers\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Ahrens\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Altmann\thanksrefErlangen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Andeen\thanksrefMarquette III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Anderson\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    I. Ansseau\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Anton\thanksrefErlangen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Archinger\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Argüelles\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Auffenberg\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Axani\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    X. Bai\thanksrefSouthDakota III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. W. Barwick\thanksrefIrvine III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    V. Baum\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Bay\thanksrefBerkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. J. Beatty\thanksrefOhio,OhioAstro III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Becker Tjus\thanksrefBochum III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K.-H. Becker\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. BenZvi\thanksrefRochester III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Berley\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Bernardini\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Bernhard\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Z. Besson\thanksrefKansas III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Binder\thanksrefLBNL,Berkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Bindig\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Bissok\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Blaufuss\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Blot\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Bohm\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Börner\thanksrefDortmund III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    F. Bos\thanksrefBochum III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Bose\thanksrefSKKU III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Böser\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    O. Botner\thanksrefUppsala III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Braun\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Brayeur\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H.-P. Bretz\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Bron\thanksrefGeneva III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Burgman\thanksrefUppsala III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Carver\thanksrefGeneva III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Casier\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Cheung\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Chirkin\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Christov\thanksrefGeneva III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Clark\thanksrefToronto III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Classen\thanksrefMunster III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Coenders\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. H. Collin\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. M. Conrad\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. F. Cowen\thanksrefPennPhys,PennAstro III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Cross\thanksrefRochester III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Day\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. P. A. M. de André\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. De Clercq\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. del Pino Rosendo\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H. Dembinski\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. De Ridder\thanksrefGent III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    P. Desiati\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. D. de Vries\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. de Wasseige\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. de With\thanksrefBerlin III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. DeYoung\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. C. Díaz-Vélez\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    V. di Lorenzo\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H. Dujmovic\thanksrefSKKU III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. P. Dumm\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Dunkman\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    B. Eberhardt\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Ehrhardt\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    B. Eichmann\thanksrefBochum III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    P. Eller\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Euler\thanksrefUppsala III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    P. A. Evenson\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Fahey\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. R. Fazely\thanksrefSouthern III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Feintzeig\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Felde\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Filimonov\thanksrefBerkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Finley\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Flis\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C.-C. Fösig\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Franckowiak\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Friedman\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Fuchs\thanksrefDortmund III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. K. Gaisser\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Gallagher\thanksrefMadisonAstro III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Gerhardt\thanksrefLBNL,Berkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Ghorbani\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    W. Giang\thanksrefEdmonton III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Gladstone\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Glagla\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Glauch\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Glüsenkamp\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Goldschmidt\thanksrefLBNL III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Golup\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. G. Gonzalez\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Grant\thanksrefEdmonton III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    Z. Griffith\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Haack\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Haj Ismail\thanksrefGent III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Hallgren\thanksrefUppsala III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    F. Halzen\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Hansen\thanksrefCopenhagen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    B. Hansmann\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Hansmann\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Hanson\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Hebecker\thanksrefBerlin III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Heereman\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Helbing\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Hellauer\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Hickford\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Hignight\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. C. Hill\thanksrefAdelaide III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. D. Hoffman\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Hoffmann\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Holzapfel\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Hoshina\thanksrefMadisonPAC,b III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    F. Huang\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Huber\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Hultqvist\thanksrefStockholmOKC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. In\thanksrefSKKU III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Ishihara\thanksrefChiba III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Jacobi\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. S. Japaridze\thanksrefAtlanta III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Jeong\thanksrefSKKU III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Jero\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    B. J. P. Jones\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Jurkovic\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Kappes\thanksrefMunster III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Karg\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Karle\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    U. Katz\thanksrefErlangen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Kauer\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Keivani\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. L. Kelley\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Kemp\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Kheirandish\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Kim\thanksrefSKKU III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Kintscher\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Kiryluk\thanksrefStonyBrook III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Kittler\thanksrefErlangen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. R. Klein\thanksrefLBNL,Berkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Kohnen\thanksrefMons III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Koirala\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H. Kolanoski\thanksrefBerlin III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Konietz\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Köpke\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Kopper\thanksrefEdmonton III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Kopper\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. J. Koskinen\thanksrefCopenhagen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Kowalski\thanksrefBerlin,Zeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Krings\thanksrefMunich III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Kroll\thanksrefBochum III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Krückl\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Krüger\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Kunnen\thanksrefBrusselsVrije,a III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Kunwar\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    N. Kurahashi\thanksrefDrexel III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Kuwabara\thanksrefChiba III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Labare\thanksrefGent III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. L. Lanfranchi\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. J. Larson\thanksrefCopenhagen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    F. Lauber\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Lennarz\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Lesiak-Bzdak\thanksrefStonyBrook III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Leuermann\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Leuner\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Lu\thanksrefChiba III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Lünemann\thanksrefBrusselsVrije,a III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. Madsen\thanksrefRiverFalls III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Maggi\thanksrefBrusselsVrije III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. B. M. Mahn\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Mancina\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Mandelartz\thanksrefBochum III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Maruyama\thanksrefYale III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Mase\thanksrefChiba III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Maunu\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    F. McNally\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    K. Meagher\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Medici\thanksrefCopenhagen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Meier\thanksrefDortmund III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Meli\thanksrefGent III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Menne\thanksrefDortmund III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Merino\thanksrefMadisonPAC III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Meures\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. Miarecki\thanksrefLBNL,Berkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Mohrmann\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Montaruli\thanksrefGeneva III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Moulai\thanksrefMIT III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    R. Nahnhauer\thanksrefZeuthen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    U. Naumann\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. Neer\thanksrefMichigan III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H. Niederhausen\thanksrefStonyBrook III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    S. C. Nowicki\thanksrefEdmonton III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. R. Nygren\thanksrefLBNL III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Obertacke Pollmann\thanksrefWuppertal III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. Olivas\thanksrefMaryland III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    A. O’Murchadha\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    T. Palczewski\thanksrefAlabama III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    H. Pandya\thanksrefBartol III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. V. Pankova\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    P. Peiffer\thanksrefMainz III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    Ö. Penek\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    J. A. Pepper\thanksrefAlabama III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Pérez de los Heros\thanksrefUppsala III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    D. Pieloth\thanksrefDortmund III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    E. Pinat\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    P. B. Price\thanksrefBerkeley III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    G. T. Przybylski\thanksrefLBNL III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    M. Quinnan\thanksrefPennPhys III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    C. Raab\thanksrefBrusselsLibre III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany Département de physique nucléaire et corpusculaire, Université de Genève, CH-1211 Genève, Switzerland Dept. of Physics and Astronomy, University of Gent, B-9000 Gent, Belgium Dept. of Physics and Astronomy, University of California, Irvine, CA 92697, USA Dept. of Physics and Astronomy, University of Kansas, Lawrence, KS 66045, USA Dept. of Astronomy, University of Wisconsin, Madison, WI 53706, USA Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin, Madison, WI 53706, USA Institute of Physics, University of Mainz, Staudinger Weg 7, D-55099 Mainz, Germany Department of Physics, Marquette University, Milwaukee, WI, 53201, USA Université de Mons, 7000 Mons, Belgium Physik-department, Technische Universität München, D-85748 Garching, Germany Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA Dept. of Physics, Yale University, New Haven, CT 06520, USA Dept. of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK Dept. of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA Physics Department, South Dakota School of Mines and Technology, Rapid City, SD 57701, USA Dept. of Physics, University of Wisconsin, River Falls, WI 54022, USA Oskar Klein Centre and Dept. of Physics, Stockholm University, SE-10691 Stockholm, Sweden Dept. of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA Dept. of Physics, Sungkyunkwan University, Suwon 440-746, Korea Dept. of Physics, University of Toronto, Toronto, Ontario, Canada, M5S 1A7 Dept. of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA Dept. of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics, Pennsylvania State University, University Park, PA 16802, USA Dept. of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA Dept. of Physics and Astronomy, Uppsala University, Box 516, S-75120 Uppsala, Sweden Dept. of Physics, University of Wuppertal, D-42119 Wuppertal, Germany DESY, D-15735 Zeuthen, Germany    L. Rädel\thanksrefAachen III. Physikalisches Institut, RWTH Aachen University, D-52056 Aachen, Germany Department of Physics, University of Adelaide, Adelaide, 5005, Australia Dept. of Physics and Astronomy, University of Alaska Anchorage, 3211 Providence Dr., Anchorage, AK 99508, USA CTSPS, Clark-Atlanta University, Atlanta, GA 30314, USA School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA 30332, USA Dept. of Physics, Southern University, Baton Rouge, LA 70813, USA Dept. of Physics, University of California, Berkeley, CA 94720, USA Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany Fakultät für Physik & Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany Physikalisches Institut, Universität Bonn, Nussallee 12, D-53115 Bonn, Germany Université Libre de Bruxelles, Science Faculty CP230, B-1050 Brussels, Belgium Vrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium Dept. of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA Dept. of Physics and Institute for Global Prominent Research, Chiba University, Chiba 263-8522, Japan Dept. of Physics and Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Dept. of Physics, University of Maryland, College Park, MD 20742, USA Dept. of Physics and Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210, USA Dept. of Astronomy, Ohio State University, Columbus, OH 43210, USA Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark Dept. of Physics, TU Dortmund University, D-44221 Dortmund, Germany Dept. of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA Dept. of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2E1 Erlangen Centre for Astroparticle Physics, Friedrich-Alexander-Universit