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MAXI/GSC detection of a renewed outburst from the black hole candidate H 1743-322

ATel #5241; S. Nakahira (JAXA), J. Sugimoto, M. Serino, T. Mihara (RIKEN), H. Negoro (Nihon U), M. Sugizaki, M. Morii, T. Yamamoto, T. Takagi, M. Matsuoka, (RIKEN), S. Ueno, H. Tomida, M. Kimura, M. Ishikawa, Y. Nakagawa (JAXA), N. Kawai, R. Usui, K. Ishikawa, T. Yoshii (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Nakano, Y. Kawakubo (AGU), H. Tsunemi, M. Sasaki (Osaka U.), M. Nakajima, K. Fukushima, T. Onodera, K. Suzuki (Nihon U.), Y. Ueda, M. Shidatsu, T. Kawamuro (Kyoto U.), Y. Tsuboi, M. Higa (Chuo U.), M. Yamauchi, K. Yoshidome, H. Yamada, Y. Ogawa (Miyazaki U.), K. Yamaoka (Nagoya U.) report on behalf of the MAXI team
on 1 Aug 2013; 02:14 UT
Credential Certification: Satoshi NAKAHIRA (nakahira@crab.riken.jp)

Subjects: X-ray, Binary, Black Hole

Referred to by ATel #: 5332, 8751

We report on an enhancement of X-ray flux from the black hole candidate H 1743-322 detected with MAXI/GSC. The MAXI/GSC nova alert system triggered the event on 2013 July 31 04:48 (UT).

The 2-20 keV X-ray flux is 33+9-8 mCrab on MJD56504.0-56405.0. Swift/BAT hard X-ray monitor also shows an increase of hard X-rays. These results indicate that the source is now entering into a new outburst. Recent outbursts are reported in, e.g. ATel#2364, #2774, #3842 and #4419. The interval from the onset of previous outburst (#4419) is 310 days, which is getting longer gradually.

The latest light curves and Image of this source are available at the following URL:
http://maxi.riken.jp/top/index.php?cid=1&jname=J1746-322 .
Note that H1743-322 is located near the Galactic center and the Galactic ridge X-ray emission is not completely removed in the flux of the light curve.
Multi-wavelength observations are encouraged.