MAXI/GSC detection of a short X-ray transient MAXI J1714-130 / XRF 150912 and Swift non-detection in XRT follow-up observations
ATel #8050; M. Nakajima, H. Negoro (Nihon U.), T. Mihara (RIKEN), J. A. Kennea (PSU), M. Arimoto (Tokyo Tech), S. Ueno, H. Tomida, S. Nakahira, M. Kimura, M. Ishikawa, Y. E. Nakagawa (JAXA), M. Sugizaki, M. Serino, M. Shidatsu, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, T. Yoshii, Y. Tachibana, Y. Ono, T. Fujiwara (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo, H. Ohtsuki (AGU), H. Tsunemi, R. Imatani (Osaka U.), K. Tanaka, T. Masumitsu (Nihon U.), Y. Ueda, T. Kawamuro, T. Hori (Kyoto U.), Y. Tsuboi, S. Kanetou (Chuo U.), M. Yamauchi, D. Itoh (Miyazaki U.), K. Yamaoka (Nagoya U.), M. Morii (ISM) report on behalf of the MAXI team:
on 13 Sep 2015; 16:19 UT
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
Subjects: X-ray, Transient
The MAXI/GSC nova alert system triggered an uncatalogued faint X-ray transient source at UT 2015-09-12 21:03:00 (MJD 57277.8771). Assuming that the source flux was constant over the transit, we obtain the source position at
(R.A., Dec) = (258.585 deg, -13.060 deg) = (17 14 20, -13 03 36) (J2000)
with a statistical 90% C.L. elliptical error region with long and short radii of 0.41 deg and 0.35 deg, respectively. The roll angle of long axis from the north direction is 7.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius).
The 4-10 keV X-ray fluxes in the scan transits at 19:30, 21:03 and 22:35 were 0.047 ± 0.044 photons/cm2/sec, 0.129 ± 0.052 photons/cm2/sec and -0.027 ± 0.032 photons/cm2/sec, respectively.
We then requested Swift XRT followup observations, and a 7-point tiling observation of the error circle, with exposures of approximately 500 sec per tile, were performed from 2015-09-13 06:24:27 to 08:24:43. But, there is no new source detected in any of the 7 fields.
The latest light curves and images of MAXI J1714-130 are available at the URL:
http://maxi.riken.jp/top/index.php?cid=1&jname=J1714-130
