Institution: | 1. Department of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, South Korea;2. Department of Physics, Graduate School of Science, Nagoya University, Nagoya 464-8602, Japan;3. Department of Earth Sciences, Pusan National University, Pusan 609-735, South Korea;4. Institute for Cosmic Ray Research, University of Tokyo, Chiba 277-8582, Japan;5. Center for High Energy Geophysics Research, Earthquake Research Institute, University of Tokyo, Tokyo 113-0032, Japan;1. University of Tennessee, Knoxville, TN, USA;2. Y-12 National Security Complex, Oak Ridge, TN, USA;1. Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München, Germany;2. Arnold Sommerfeld Center for Theoretical Physics, LMU, Theresienstr. 37, 80333 München, Germany;3. Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Via Marzolo 8, 35131 Padova, Italy;4. INFN, Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy |