銀河中心，京都大学の成果

http://www-cr.scphys.kyoto-u.ac.jp/research/xray/recent_results.html

papers

e.g.

S. G. Ryu, Masayoshi Nobukawa, Shinya Nakashima, Takeshi Go Tsuru, K. Koyama and H. Uchiyama.

PASJ 65 (2013) http://pasj.oxfordjournals.org/content/65/2/33