MAXI/GSC detects a possible new outburst from the black hole candidate Swift J1842.5-1124
ATel #13762; M. Shidatsu (Ehime U.), H. Negoro, M. Nakajima, M. Aoki, K. Kobayashi, R. Takagi, K, Asakura, K, Seino, S. Mokumoto (Nihon U.), T. Mihara, C. Guo, Y. Zhou, T. Tamagawa, M. Matsuoka (RIKEN), T. Sakamoto, M. Serino, S. Sugita, H. Nishida, A. Yoshida (AGU), Y. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, Y. Okamoto, S. Kitakoga (Chuo U.), N. Kawai, R. Adachi, M. Niwano (Tokyo Tech), S. Nakahira, Y. Sugawara, S. Ueno, H. Tomida, M. Ishikawa, M. Tominaga, T. Nagatsuka (JAXA), Y. Ueda, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.), H. Tsunemi (Osaka U.), M. Yamauchi, K. Kurogi, K. Miike (Miyazaki U.), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC) report on behalf of the MAXI team:
on 26 May 2020; 06:14 UT
Credential Certification: Megumi Shidatsu (shidatsu@kusastro.kyoto-u.ac.jp)
Subjects: X-ray, Binary, Black Hole, Transient
The MAXI/GSC nova alert system triggered on the position consistent with that of the Galactic black hole candidate Swift J1842.5-1124, which was in quiescence since the last outburst in 2008 (ATel #1610, #1706, #1716, #1720). The source was first significantly detected with the MAXI/GSC on March 23 (MJD 58992) with a one-day-averaged 2-10 keV intensity of 13 +/- 3 mCrab. The latest intensity is 17 +/- 3 mCrab on March 25 (MJD 58994). In the previous outburst in 2008, the source was also detected in the UV (ATel #1716) and near-infrared band (ATel #1720) and exhibited the state transition to the high/soft state (Zhao et al. 2016, A&A, 593, 23). Follow-up observations are encouraged.
