MAXI/GSC detection of a possible flare from the dMe star V1054 Oph
ATel #4114; S. Nakahira (JAXA), M. Higa, Y. Tsuboi (Chuo U.), S. Ueno, H. Tomida, M. Ishikawa(JAXA), Y. Ueda, K. Hiroi, M. Shidatsu, R. Sato (Kyoto U.), M. Matsuoka, T. Mihara, M. Sugizaki, M. Serino, T. Yamamoto(RIKEN), N. Kawai M. Morii, R. Usui (Tokyo Tech), K. Yamaoka (Waseda U.), H. Negoro, M. Nakajima, F. Suwa, M. Asada, H. Sakakibara, N. Serita (Nihon U.), A. Yoshida (AGU), H. Tsunemi, M. Kimura (Osaka U.), M. Yamauchi, Y. Nishim
on 18 May 2012; 12:13 UT
Credential Certification: Satoshi NAKAHIRA (nakahira@crab.riken.jp)
Subjects: X-ray, Star, Transient
On 2012-05-17 16:25:02 UT (=MJD 56064.684), the MAXI/GSC transient alert system triggered on
enhanced X-ray emission from the position consistent with V1054 Oph (= Wolf 630; dM3.5e star).
The 2-10 keV flux averaged over the 44-second triangular transit was about 140 mCrab, corresponding
to a luminosity of 1 × 1031 ergs/s
for an assumed distance of 6.4 pc. The flux decayed to an upper limit of ~20 mCrab
at the next scan performed 92 minutes later.
This is the first flaring event that MAXI/GSC detected from this source.
