MAXI/GSC detection of a new soft X-ray transient MAXI J0126-745
ATel #12833; H. Negoro, M. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.), S. Nakahira, T. Mihara, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Nishida, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.), M. Shidatsu (Ehime U.), N. Kawai, M. Sugizaki, M. Oeda, K. Shiraishi (Tokyo Tech), S. Ueno, H. Tomida, M. Ishikawa, Y. Sugawara, N. Isobe, R. Shimomukai, M. Tominaga (JAXA), Y. Ueda, A. Tanimoto, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.), H. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.), M. Yamauchi, S. Iwahori, Y. Kurihara, K. Kurogi, K. Miike (Miyazaki U.), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU) report on behalf of the MAXI team:
on 3 Jun 2019; 11:56 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
Subjects: X-ray, Transient
MAXI/GSC detected a soft X-ray transient source on June 1-2, 2019. Assuming that the source flux was constant over 8 scan transits from 20:53 on June 1 to 09:16 on June 2 and only using 2-4 keV data, we obtain the source position at
(R.A., Dec) = (21.574 deg, -74.576 deg) = (01 26 17, -74 34 33) (J2000)
with a statistical 90% C.L. elliptical error region with long and short radii of 0.70 deg and 0.41 deg, respectively. The roll angle of the long axis from the north direction is 129.0 deg counterclockwise. There is an additional systematic uncertainty of 0.1 deg (90% containment radius). The X-ray flux averaged over the scan was 24 +- 5 mCrab (2.0-4.0keV, 1 sigma error). Significant flux is not recognized above 4 keV.
Since the source is in the direction of the Small Magellanic Cloud and the relatively large uncertainty in the localization, we can not identify the source. Then, we tentatively name the source MAXI J0126-745. Followup observations are encouraged.
MAXI J0126-745
