MAXI/GSC detection of the X-ray outburst from Be/X-ray binary pulsar GS 0834-430
ATel #8175; M. Nakajima (Nihon U.), T. Mihara, M. Sugizaki (RIKEN), S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), M. Serino, M. Shidatsu, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, M. Arimoto, T. Yoshii, Y. Tachibana, Y. Ono, T. Fujiwara (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, R. Imatani (Osaka U.), H. Negoro, K. Tanaka, T. Masumitsu (Nihon U.), Y. Ueda, T. Kawamuro, T. Hori (Kyoto U.), Y. Tsuboi, S. Kanetou (Chuo U.), M. Yamauchi, D. Itoh (Miyazaki U.), K. Yamaoka (Nagoya U.), M. Morii (ISM)
on 16 Oct 2015; 04:46 UT
Credential Certification: Motoki Nakajima (nakajima.motoki@nihon-u.ac.jp)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
The MAXI/GSC detected an X-ray outburst from Be/X-ray binary pulsar GS 0834-430. The MAXI/GSC data shows that the current brightening started from October 5 (MJD 57300), corresponding to the ~0.12 orbital phase (Porb=105.8 d, T0=56124.5(MJD); Wilson et al. 1997). The day-averaged flux in the 4-10 keV energy band reached 0.033 +- 0.007 photons/s/cm2 (27 +- 6 mCrab) on October 12 (MJD 57307). The flux increase rate between October 7 (MJD 57302) and October 12 (MJD 57307) is 4.71e-3 phtons/s/cm2/day. Compared with the flux increase rate (25.0e-3 phtoons/s/cm2/day) of the 2012 outburst (Atel #4218,#4235), the current increase rate is only 0.19 of it. The Swift/BAT monitor also detected the current outburst, and exhibited similar results to the MAXI/GSC.
The latest light curve can be checked at the following page;
http://maxi.riken.jp/top/index.php?cid=1&jname=J0835-431
