MAXI/GSC detection of the new X-ray transient Swift J1913.1+1946
ATel #15651; H. Negoro, M. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima (Nihon U.), T. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Hiramatsu, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, J. Kohara (Chuo U.), M. Shidatsu, M. Iwasaki (Ehime U.), N. Kawai, M. Niwano, R. Hosokawa, Y. Imai, N. Ito, Y. Takamatsu (Tokyo Tech), S. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, T. Kurihara (JAXA), Y. Ueda, S. Ogawa, K. Setoguchi, T. Yoshitake, K. Inaba (Kyoto U.), M. Yamauchi, T. Sato, R. Hatsuda, R. Fukuoka, Y. Hagiwara, Y. Umeki (Miyazaki U.), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), and M. Sugizaki (NAOC)
on 9 Oct 2022; 17:24 UT
Credential Certification: Hitoshi Negoro (negoro@phys.cst.nihon-u.ac.jp)
Subjects: X-ray, Transient
The bright X-ray new transient Swift J1913.1+1946 (Dichiara et al. ATel #15650/GCN Circ. 32633) triggered the MAXI/GSC Nova-Alert System at 15:31 UT on 2022 October 9. Delayed COR data, the stored data in the ISS due to the interruption of the ISS-to-ground communication, showed that the source was already as bright as about 2.5 Crab in the 4-10 keV band at 13:58 on October 9. After that, the 4-10 keV flux rapidly decreased to about 500 mCrab at 15:31 and about 250 mCrab at 17:04.
The source was detected near the edge of detectors, which makes it difficult to obtain the accurate flux and energy spectra at these scans. We will report later.
Followup observations are encouraged.
Trigger information about Swift J1913.1+1946
