MAXI/GSC detection of a new soft X-ray transient MAXI J0758-456
ATel #8983; Y. E. Nakagawa (JAXA), H. Negoro, (Nihon U.), S. Ueno, H. Tomida, S. Nakahira, M. Ishikawa, Y. Sugawara (JAXA), T. Mihara, M. Sugizaki, M. Serino, M. Shidatsu, W. Iwakiri, J. Sugimoto, T. Takagi, M. Matsuoka (RIKEN), N. Kawai, N. Isobe, S. Sugita, T. Yoshii, Y. Tachibana, Y. Ono, T. Fujiwara (Tokyo Tech), A. Yoshida, T. Sakamoto, Y. Kawakubo (AGU), M. Nakajima
on 24 Apr 2016; 17:28 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
The MAXI/GSC nova-alert system triggered on a bright uncatalogued X-ray transient source at 15:05:06 UT on 2016 April 24.
Preliminary analysis shows the source position at around (R.A., Dec) = (119.58 deg, -45.63 deg) with an typical error of 0.5 deg. A more precise position may be given through the MAXI mailing list. The preliminary analysis also shows that 2-4 keV and 4-10 keV fluxes averaged over the scan transit were roughly 300 mCrab and 200 mCrab, respectively, indicating the source spectrum was soft.
Since there are no known bright X-ray sources near the source position, we tentatively name the source MAXI J0758-456. We encourage followup observations.
MAXI/GSC detection of MAXI J0758-456
