{
  "bibcode": "2021GCN.29223....1G",
  "body": "C. Guo (RIKEN), M. Serino (AGU), H. Negoro, \nM. Nakajima, M. Aoki, K. Kobayashi, R. Takagi, K, Asakura, K, Seino (Nihon U.),\nT. Mihara, T. Tamagawa, M. Matsuoka (RIKEN),\nT. Sakamoto, S. Sugita, H. Nishida, K. Komachi, A. Yoshida (AGU),\nY. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, Y. Okamoto, S. Kitakoga (Chuo U.),\nM. Shidatsu (Ehime U.),\nN. Kawai, R. Adachi, M. Niwano, R. Hosokawa (Tokyo Tech),\nS. Nakahira, Y. Sugawara, S. Ueno, H. Tomida, M. Ishikawa, M. Tominaga, T. Nagatsuka (JAXA),\nY. Ueda, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake, U. Goto, R. Uematsu (Kyoto U.),\nH. Tsunemi (Osaka U.),\nM. Yamauchi, K. Kurogi, K. Miike (Miyazaki U.),\nT. Kawamuro (NAOJ),\nK. Yamaoka (Nagoya U.),\nY. Kawakubo (LSU),\nM. Sugizaki (NAOC) \nreport on behalf of the MAXI team:\n\nThe MAXI/GSC nova alert system triggered on a bright uncatalogued X-ray transient source at 2021-01-02T09:03:48 UT.\nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n(R.A., Dec) = (353.323 deg, -21.086 deg) = (23 33 18, -21 05 10) (J2000)\nwith a statistical 90% C.L. circular error region\nwith a radius of 0.5 deg.\nThere is an additional systematic uncertainty of 0.1 deg (90% containment radius).\nThe X-ray flux averaged over the scan was 238 +- 31 mCrab\n(2.0-4.0keV, 1 sigma error).\nThere was no significant excess flux in the next transit at 10:36 UT\nwith an upper limit of 20 mCrab.",
  "circularId": 29223,
  "createdOn": 1609591096000,
  "email": "motoko@crab.riken.jp",
  "subject": "GRB 210102B: MAXI/GSC detection",
  "submitter": "Motoko Serino at RIKEN/MAXI  <motoko@crab.riken.jp>",
  "eventId": "GRB 210102B"
}