{
  "bibcode": "2020GCN.28240....1S",
  "body": "S. Sugita (AGU), H. Negoro, M. Nakajima, M. Aoki,\nK. Kobayashi, R. Takagi, K, Asakura, K, Seino (Nihon U.),\nT. Mihara, C. Guo, Y. Zhou, T. Tamagawa, M. Matsuoka (RIKEN),\nT. Sakamoto, M. Serino, H. Nishida, A. Yoshida (AGU),\nY. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, Y. Okamoto, S. Kitakoga (Chuo U.),\nM. Shidatsu (Ehime U.), N. Kawai, R. Adachi, M. Niwano (Tokyo Tech),\nS. Nakahira, Y. Sugawara, S. Ueno, H. Tomida, M. Ishikawa, M.\nTominaga, T. Nagatsuka (JAXA),\nY. Ueda, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.),\nH. Tsunemi (Osaka U.), M. Yamauchi, K. Kurogi, K. Miike (Miyazaki U.),\nY. Kawakubo (LSU), T. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), M.\nSugizaki (NAOC)\nreport on behalf of the MAXI team:\n\nThe MAXI/GSC nova alert system triggered a bright uncatalogued X-ray\ntransient source at 15:41:27 UT on 2020 Aug 9.\nAssuming that the source flux was constant over the transit,\nwe obtain the source position at\n(R.A., Dec) = (15.369 deg, -73.867 deg) = (01 01 28, -73 52 01) (J2000)\nwith a 90% C.L. statistical error of 0.38 deg and an additional\nsystematic uncertainty of 0.1 deg (90% containment radius).\nThe position was consistent with GRB200809B (Fermi GBM: GCN 28236,\nSwift BAT: 28237).\nThe X-ray flux averaged over the scan was 94 +- 17 mCrab\n(4.0-10.0keV, 1 sigma error).\nThere was no significant excess flux in the next transit at 8/9\n17:14 UT with an upper limit of 20 mCrab.",
  "circularId": 28240,
  "createdOn": 1597030073000,
  "email": "sugita@phys.aoyama.ac.jp",
  "subject": "GRB 200809B: MAXI/GSC detection",
  "submitter": "Satoshi Sugita at Aoyama Gakuin U.  <sugita@phys.aoyama.ac.jp>",
  "eventId": "GRB 200809B"
}