MAXI/GSC detection of a new X-ray transient MAXI J0511-522
ATel #7200; M. Serino (RIKEN), H. Negoro (Nihon U.), T. Yoshii (Tokyo Tech), S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), T. Mihara, M. Sugizaki, M. Morii, J. Sugimoto, T. Takagi, A. Yoshikawa, M. Matsuoka (RIKEN), N. Kawai, Y. Tachibana (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, D. Uchida (Osaka U.), M. Nakajima, K. Fukushima, T. Onodera, K. Suzuki, T. Namba, M. Fujita, F. Honda (Nihon U.), Y. Ueda, M. Shidatsu, T. Kawamuro, T. Hori (Kyoto U.), Y. Tsuboi, A. Kawagoe (Chuo U.), M. Yamauchi, Y. Morooka, D. Itoh (Miyazaki U.), K. Yamaoka (Nagoya U.)
on 11 Mar 2015; 05:49 UT
Credential Certification: Motoko Suzuki (motoko@crab.riken.jp)
Subjects: X-ray, Binary, Black Hole, Neutron Star, Transient
Referred to by ATel #: 7210
The MAXI/GSC nova alert system triggered a faint X-ray transient at 03:06:21
on March 11, 2015. We obtained the source position at
(R.A., Dec) = (77.752 deg, -52.204 deg) = (05 11 00, -52 12 14) (J2000)
with long and short radii of 0.57 deg and 0.47 deg, respectively.
The roll angle of long axis from the north direction is 81.0 deg counterclockwise.
There is an additional systematic uncertainty of 0.1 deg (90% containment radius).
The 4-10 keV flux has increased since March 10.3. The average 4-10 keV
flux from March 10.3 to 11.2 is 0.018 +/- 0.005
photons/cm2/s (corresponding to 14+/-4 mCrab).
We tentatively name the source MAXI J0511-522. There is a cataloged X-ray
source near the position, 1H 0513-518, apart from the best position by 38',
but the nature of this source is not known. The follow-up observations are
strongly encouraged to reveal the nature of the source.
The latest light curves and images of MAXI J0511-522 by MAXI/GSC is
placed at the following URL:
http://maxi.riken.jp/top/index.php?cid=1&jname=J0511-522