Institution: | (1) Nishi-Harima Astronomical Observatory, Ohnadesan, Sayo-cho, 679-53 Hyogo, Japan;(2) Astronomical Institute, Tôhoku University, 980 Sendai, Japan;(3) Space System Dept., Fujitsu Ltd., Nakase 1-chome, Mihama-ku, 261 Chiba, Japan;(4) Astronomical Institute, Tôhoku University, 980 Sendai, Japan |