MAXI/GSC detection of a soft X-ray flare in Cam
ATel #5444; Y. Ogawa (Miyazaki U.), H. Negoro (Nihon U.), Y. Tsuboi, M. Higa (Chuo U.), Y. Kawakubo (AGU), S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), T. Mihara, M. Sugizaki, M. Morii, M. Serino, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, R. Usui, K. Ishikawa, T. Yoshii (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Nakano (AGU), H. Tsunemi, M. Sasaki (Osaka U.), M. Nakajima, H. Sakakibara, K. Fukushima, T. Onodera, K. Suzuki (Nihon U.), Y. Ueda, M. Shidatsu, T. Kawamuro (Kyoto U.), A. Kawagoe (Chuo U.), M. Yamauchi, K. Yoshidome, H. Yamada (Miyazaki U.), K. Yamaoka (Nagoya U.) report on behalf of the MAXI team
on 5 Oct 2013; 16:54 UT
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
Subjects: X-ray, Binary, Cataclysmic Variable, Star, Transient, Variables
During a scan transit at 06:36 UT on October 5th, 2013, MAXI/GSC detected a soft X-ray flare from the region in Camelopardalis.
If a constant source flux is assumed, we obtain the source position at (R.A., Dec) = (126.99 deg, 81.16 deg) = (08 27 57, +81 09 35) (J2000) with a 90% C.L. statistical error of 0.48 deg and an additional systematic uncertainty of 0.1 deg (90% containment radius).
The 4-10 keV X-ray flux averaged over the scan transit was 72 +- 19 mCrab. There was no significant excess flux in the previous transit at 05:03 UT and in the next transit at 08:09 UT with an upper limit of 20 mCrab for each.
No known bright source exists within the error circle region. V* V496 Cam, a W UMa Variable, lies 0.31 arc-deg from the position above. All the stellar X-ray flares detected with MAXI/GSC so far are from stars in the ROSAT All-Sky Survey Bright Source Catalogue (1RXS, Voges et al. 1999). On the other hand, V* V496 Cam is not listed in the 1RXS catalogue. This may indicate that this event does not come from V* V496 Cam. We tentatively name this source MAXI J0827+811.
MAXI flash report
