[1] Department of Physics, School of Science, Saitama University, Sakura, Saitama 338-8570
[2] Department of Physics, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033
[3] Department of Physics, Tokyo Metroporitan University, Hachioji, Tokyo 192-0397
[4] Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 229-8510
[5] Department of Astronomy, Kyoto University, Sakyo-ku, Kyoto 606-8502, Kitashirakawa-Oiwake-cho
[6] SRON, National Institute for Space Research, 3584 CA Utrecht
[7] Mitsubishi Heavy Industry, Co., Ltd., Komaki, Aichi 485-8561
[8] Department of Physical Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526
[9] Stanford Linear Accelerator Center (SLAC), Menlo Park, CA 94025
[10] Makishima Cosmic Radiation Laboratory, RIKEN, Wako, Saitama 351-0198
[11] Department of Physics, Faculty of Science, Kanazawa University, Kanazawa, Ishikawa 920-1192, Kakuma-machi
[12] Department Ofphysics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043
[13] Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558