MAXI/GSC detection of an active state of the RS CVn type star UX Ari
ATel #3308; T. Matsumura, Y. Tsuboi, K. Yamazaki (Chuo U.), M. Morii (Tokyo Tech), S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA), T. Mihara, M. Sugizaki, M. Serino, S. Nakahira, T. Yamamoto, T. Sootome, M. Matsuoka (RIKEN), N. Kawai, K. Sugimori, R. Usui, T. Toizumi (Tokyo Tech), A. Yoshida, K. Yamaoka (AGU), H. Tsunemi, M. Kimura, H. Kitayama (Osaka U.), H. Negoro, M. Nakajima, F. Suwa (Nihon U.), Y. Ueda, K. Hiroi, M. Shidatsu (Kyoto U.)
on 27 Apr 2011; 12:58 UT
Credential Certification: Yohko Tsuboi (tsuboi@phys.chuo-u.ac.jp)
Subjects: X-ray, Binary, Star, Transient, Variables
Referred to by ATel #: 6315
We report an X-ray detection with MAXI/GSC from the position consistent with the RS CVn type variable UX Ari.
The flux increasing was observed from 2011-04-26 09:36 (UT) (= MJD 55677.414) and the active state lasted at least to the latest transit starting at 2011-04-27 05:42 (UT) (= MJD 55678.238). The active state seems to comprise multiple flares, and the flux maximum was observed at the transit starting from 2011-04-27 01:13 (UT) (= MJD 55678.051) with the preliminary flux of about 130 +-30 mCrab (1-sigma statistical error) in the 4-10 keV band.
