MAXI observation of renewed X-ray activity from MAXI J1910-057

ATel #15214; M. Tominaga, S. Nakahira (JAXA), H. Negoro (Nihon U), M. Serino, S. Sugita (AGU), M. Nakajima, K. Kobayashi, K. Asakura, K. Seino (Nihon U.), T. Mihara, T. Tamagawa, J. Li, M. Matsuoka (RIKEN), T. Sakamoto, K. Komachi, H. Hiramatsu, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, H. Kawai, Y. Okamoto, S. Kitakoga, 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. Ueno, H. Tomida, M. Ishikawa, T. Nagatsuka, M. Kurihara (JAXA), Y. Ueda, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake, Y. Goto, R. Uematsu, K. Inaba (Kyoto U.), H. Tsunemi (Osaka U.), M. Yamauchi, Y. Nonaka, T. Sato, R. Hatsuda, R. Fukuoka (Miyazaki U.), T. Kawamuro (UDP/NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC)
on 8 Feb 2022; 10:19 UT
Credential Certification: Satoshi NAKAHIRA (nakahira@crab.riken.jp)

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We report on a renewed X-ray activity from the black hole candidate MAXI J1910-057 detected with MAXI/GSC.
The MAXI/GSC nova alert system detected an X-ray enhancement on 2022 February 4 17:41:38 UT. On 2022 February 5 (MJD 59615), it became clear that the X-ray emission was from the position consistent with the black hole candidate MAXI J1910-057 in the GSC image accumulated over the last 2 days. The 2-6 keV flux reached 17 mCrab on 2022 February 5. Then the flux gradually declined and it dropped to ~7 mCrab on 2022 February 7 (MJD 59617). Since the source had not been observed with MAXI/GSC for 10 days until 2022 February 3 because of the sun constraint, the flare had started on some day between January 25 and February 3.
The source was first detected by MAXI/GSC on 2012 May 31 (MJD 56078) (ATel #4140). Since Swift/BAT detected the source independently (ATel #4139), this source is also referred to as Swift J1910.2-0546. The X-ray outburst continued until 2013 January 26 (MJD 56318) (Nakahira et al. 2014).

The follow-up observations are strongly recommended.