MAXI/GSC detects X-ray brightening of a symbiotic X-ray binary 4U 1954+319
ATel #2702; M. Sugizaki, T. Mihara, Y. E. Nakagawa, M. Suzuki, T. Sootome, T. Yamamoto, M. Matsuoka (RIKEN), K. Kawasaki, S. Ueno, H. Tomida, M. Kohama, M. Ishikawa (JAXA), N. Kawai, M. Morii, K. Sugimori, R. Usui (Tokyo Tech), A. Yoshida, K. Yamaoka, S. Nakahira (AGU), H. Tsunemi, M. Kimura (Osaka U.), H. Negoro, M. Nakajima, H. Ozawa, F. Suwa (Nihon U.), Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi (Kyoto U.), A. Daikyuji (Miyazaki U.), A. Uzawa, T. Matsumura, K. Yamazaki (Chuo U.) report on behalf of the MAXI team
on 29 Jun 2010; 04:33 UT
Credential Certification: Mutsumi Sugizaki (sugizaki@riken.jp)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
MAXI/GSC has detected X-ray brightening of a symbiotic low-mass X-ray
binary 4U 1954+319, since 2010 June 17 (UT).
The source flux in 2--10 keV had been at a low level, about 13 mCrab on
average and at most 50 mCrab since MAXI/GSC started monitoring on 2009
August 15. The X-ray flux from this source started to increase on 2010
June 17, then reached 71 +-4 mCrab on June 24, 65 +- 5 mCrab on June 25.
It was 46 +- 5 mCrab on June 27.
Multiwavelength observations are encouraged.
The latest light curve and the image of this source are
available at the following
URL: http://maxi.riken.jp/top/index.php?cid=1&jname=J1955+320
