1. Department of Physics, Hirosaki University, Hirosaki, Aomori 036-8561
2. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3. Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582
4. Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
5. Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
6. Department of Physics, Shandong University, Jinan 250100, China
7. Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China
8. Department of Physics, Yunnan University, Kunming 650091, China
9. Faculty of Engineering, Kanagawa University, Yokohama 221-8686
10. Faculty of Education, Utsunomiya University, Utsunomiya 321-8505
11. Department of Physics, Konan University, Kobe 658-8501
12. Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555
13. Faculty of Engineering, Yokohama National University, Yokohama 240-8501
14. Department of Physics, Shinshu University, Matsumoto, Nagano 390-8621
15. Center of Space Science and Application Research, Chinese Academy of Sciences, Beijing 100080, China
16. Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing 100084, China
17. Department of Physics, Saitama University, Saitama 338-8570
18. Advanced Media Network Center, Utsunomiya University, Utsunomiya 321-8585
19. National Institute of Informatics, Tokyo 101-8430
20. Sakushin Gakuin University, Utsunomiya 321-3295
21. Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523
22. Max-Planck-Institut für Physik, München D-80805, Germany
23. College of Industrial Technology, Nihon University, Narashino, Chiba 275-8576
24. Shonan Institute of Technology, Fujisawa, Kanagawa 251-8511
25. RIKEN, Wako, Saitama 351-0198
26. School of General Education, Shinshu University, Matsumoto, Nagano 390-8621