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

ATel #9726; M. Shidatsu (RIKEN), S. Nakahira (JAXA), H. Negoro (Nihon U.), S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara (JAXA), Y. E. Nakagawa (JAMSTEC), T. Mihara, M. Sugizaki, M. Serino, W. Iwakiri, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, N. Isobe, S. Sugita, T. Yoshii, Y. Tachibana, Y. Ono, T. Fujiwara, S. Harita, Y. Muraki (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, Y. Kitaoka (AGU), H. Tsunemi, R. Shomura (Osaka U.), M. Nakajima, K. Tanaka, T. Masumitsu, T. Kawase (Nihon U.), Y. Ueda, T. Kawamuro, T. Hori, A. Tanimoto, S. Oda (Kyoto U.), Y. Tsuboi, Y. Nakamura, R. Sasaki (Chuo U.), M. Yamauchi, K. Furuya (Miyazaki U.), K. Yamaoka (Nagoya U.) report on behalf of the MAXI team:
on 7 Nov 2016; 18:48 UT
Credential Certification: Megumi Shidatsu (shidatsu@kusastro.kyoto-u.ac.jp)

Subjects: X-ray, Binary, Black Hole, Transient

The MAXI/GSC nova-alert system detected an X-ray brightening of the Galactic black hole candidate H 1743-322 in November 6, UT 03:01. The 2-20 keV flux increased from 12 +- 3 mCrab on November 4 (MJD 57696) to 37 +- 5 mCrab on November 6 (MJD 57698). Swift/BAT transient monitoring also indicates an increase of the hard X-ray flux. The 15-50 keV flux was 94 +- 12 mCrab on November 6. These results suggest that the source has entered into a new outburst, about 250 days after the onset of the last outburst in 2016 February and March (ATel #8751). The latest MAXI/GSC light curves of H 1743-322 are available at: http://maxi.riken.jp/top/index.php?cid=1&jname=J1746-322 . Note that H 1743-322 is located close to the Galactic center and that the source flux can be contaminated by the Galactic ridge X-ray emission (typically ~8 mCrab). Follow-up multi-wavelength observations are encouraged.