Optical Follow-up Observations of Transient Sources at Gunma Astronomical Observatory Kinugasa, K. ; Hashimoto, O. ; Honda, S. ; Takahashi, H. ; Taguchi, H. ; Nishihara, E. ; Gao Staff Abstract Publication: Astrophysics with All-Sky X-Ray Observations Pub Date: March 2009 Bibcode: 2009aaxo.conf..332K