| Affiliation: |
| AA(Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003.), AB(Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003. ), AC(Center for Cosmology and Particle Physics, Department of Physics, New York University, 4 Washington Place, New York, NY 10003.), AD(Princeton University Observatory, Princeton, NJ 08544.), AE(Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721.), AF(Princeton University Observatory, Princeton, NJ 08544.), AG(Apache Point Observatory, 2001 Apache Point Road, P.O. Box 59, Sunspot, NM 88349.), AH(Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 2778582, Japan.), AI(Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218.), AJ(Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 2778582, Japan; Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213.) |