MAXI/GSC detection of a possible X-ray flare from an RS CVn star CF Tuc
ATel #3897; T. Yamamoto (RIKEN), K. Yamazaki, Y. Tsuboi (Chuo U.), S. Nakahira, M. Serino, T. Mihara, M. Sugizaki, T. Sootome, M. Matsuoka (RIKEN), S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA), N. Kawai, M. Morii, K. Sugimori, R. Usui, T. Toizumi, Y. Aoki, S. Song (Tokyo Tech), A. Yoshida, K. Yamaoka (AGU), H. Tsunemi, M. Kimura, H. Kitayama (Osaka U.), H. Negoro, M. Nakajima, F. Suwa, M. Asada, H. Sakakibara (Nihon U.), Y. Ueda, K. Hiroi, M. Shidatsu (Kyoto U.), T. Matsumura (Chuo U.), M. Yamauchi, Y. Nishimura, T. Hanayama (Miyazaki U.) report on behalf of the MAXI team
on 30 Jan 2012; 13:00 UT
Credential Certification: Yohko Tsuboi (tsuboi@phys.chuo-u.ac.jp)
Subjects: X-ray, Binary, Star, Transient, Variables
Referred to by ATel #: 12009
On 2012-01-30 08:25:38 UT (=MJD 55956.351), the MAXI/GSC transient alert system triggered on enhanced X-ray emission from the position consistent with the CF Tuc (RS CVn system). The significant X-ray flux in the 2-20 keV band had been detected at 2012-01-30 03:45 (UT)(=MJD 55956.157) and activity continued about 3 hours. The maximum X-ray flux and the luminosity are about 60 mCrab and 2×1033 ergs/s in 2-20 keV band, respectively, if the distance is assumed to be 89 pc. The flare from this source is the first detection with MAXI/GSC.
