[1] DESY, D-15738 Zeuthen, Germany
[2] Inst Phys, Sachivalaya Marg,Sain Sch Post, Bhubaneswar 751005, India
[3] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India
[4] Abdus Salaam Int Ctr Theoret Phys, Str Costiera 11, I-34151 Trieste, Italy
[5] Univ Santiago Compostela, Inst Galego Fis Altas Enerxias, Santiago De Compostela, Spain
[6] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain
[7] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[8] Harvard Univ, Lab Particle Phys & Cosmol, Cambridge, MA 02138 USA
[9] Univ Copenhagen, Niels Bohr Int Acad, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[10] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[11] Penn State Univ, Inst Gravitat & Cosmos, Dept Phys, State Coll, PA 16802 USA
[12] Penn State Univ, Inst Astron & Astrophys, State Coll, PA 16802 USA
[13] Brookhaven Natl Lab, Phys Dept, High Energy Theory Grp, Upton, NY 11973 USA
[14] Aix Marseille Univ, CPPM, CNRS IN2P3, Marseille, France
[15] Russian Acad Sci, Inst Nucl Res, Moscow, Russia
[16] Inst Res Fundamental Sci IPM, Sch Phys, Tehran, Iran
[17] Univ Valencia UV, Inst Fis Corpuscular IFIC, Valencia 46980, Spain
[18] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany
[19] Uppsala Univ, Dept Phys & Astron, SE-75237 Uppsala, Sweden
[20] Nikhef, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands
[21] Univ Amsterdam, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
[22] Radboud Univ Nijmegen, Dept Astrophys, IMAPP, NL-6500 GL Nijmegen, Netherlands
[23] Ist Nazl Fis Nucl, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy
[24] Dipartimento Fis & Astron Univ, Viale Berti Pichat 6-2, I-40127 Bologna, Italy
[25] Chung Ang Univ, High Energy Phys Ctr, Seoul 06974, South Korea
[26] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[27] Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA
[28] CERN, Esplande Particules, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland
[29] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[30] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[31] NASA GSFC, Lab Astroparticle Phys, Greenbelt, MD 20771 USA
[32] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[33] Georgia Inst Technol, Sch Phys & Ctr Relativist Astrophys, Atlanta, GA 30332 USA
[34] Univ Hawaii Manoa, Honolulu, HI 96822 USA
[35] Ohio State Univ, Ctr Cosmol & AstroParticle Phys, Dept Phys, Columbus, OH 43210 USA
[36] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA
[37] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[38] Tech Univ Munich, Dept Phys, D-86748 Garching, Germany
[39] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA
[40] Colorado Sch Mines, Golden, CO 80401 USA
[41] Chiba Univ, Int Ctr Hadron Astrophys, Chiba 2688522, Japan
[42] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA