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MAXI/GSC detects a re-brightening from the black hole candidate H 1743-322

ATEL # 2774; S. Nakahira, K. Yamaoka, A. Yoshida (AGU), H. Negoro, M. Nakajima, H. Ozawa, F. Suwa (Nihon U.), T. Mihara, M. Sugizaki, M. Suzuki, Y.E. Nakagawa, T. Yamamoto, T. Sootome, M. Matsuoka (RIKEN), N. Kawai, M. Morii, K. Sugimori, R. Usui (Tokyo Tech), K. Kawasaki, S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA), H. Tsunemi, M. Kimura (Osaka U.), Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi (Kyoto U.), A. Daikyuji (Miyazaki U.), A. Uzawa, T. Matsumura, K. Yamazaki (Chuo U.), on behalf of the MAXI team
on 6 Aug 2010; 12:44 UT
Distributed as an Instant Email Notice (Transients)
Password Certification: Kazutaka Yamaoka (

Subjects: X-ray, Binaries, Black Holes
Referred to by ATEL #: 2781, 2788

An increase of X-ray flux of the black hole candidate H 1743-322 was observed with MAXI/GSC on 2010 August 5 at 53+-5 mCrab in the 2-20 keV range. The RXTE/PCA Galactic scan observations and the Swift BAT hard X-ray monitor also show a rapid increase in both soft and hard X-rays. This indicates a beginning of a new outburst where the source would be in the low/hard state. Multi-wavelength observations of this initial stage of the outburst are strongly encouraged. The latest light curve and the image of this source are publicly available at the following URL: . Please note that H 1743-322 is located near the Galactic Center and its flux may be contaminated by nearby sources and the Galactic ridge emission.

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R. E. Rutledge , Editor
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