{
  "bibcode": "2019GCN.25817....1N",
  "body": "H. Negoro (Nihon U.), S. Sugita, M. Serino (AGU), N. Kawai (Tokyo Tech), \nM. Nakajima, W. Maruyama, M. Aoki, K. Kobayashi (Nihon U.), \nT. Mihara, T. Tamagawa, M. Matsuoka (RIKEN), \nT. Sakamoto, H. Nishida, A. Yoshida (AGU), \nY. Tsuboi, W. Iwakiri, R. Sasaki, H. Kawai, T. Sato (Chuo U.), \nM. Shidatsu (Ehime U.), M. Oeda, K. Shiraishi (Tokyo Tech), \nS. Nakahira, Y. Sugawara, S. Ueno, H. Tomida, M. Ishikawa, N. Isobe, R. Shimomukai, M. Tominaga (JAXA), \nY. Ueda, A. Tanimoto, S. Yamada, S. Ogawa, K. Setoguchi, T. Yoshitake (Kyoto U.), \nH. Tsunemi, T. Yoneyama, K. Asakura, S. Ide (Osaka U.), \nM. Yamauchi, S. Iwahori, Y. Kurihara, K. Kurogi, K. Miike (Miyazaki U.), \nT. Kawamuro (NAOJ), K. Yamaoka (Nagoya U.), Y. Kawakubo (LSU), M. Sugizaki (NAOC) \nreport on behalf of the MAXI team: \n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV) \nafter the LVC trigger S190923y at 2019-09-23 12:55:59.645 UTC (GCN 25814). \n\nAt the trigger time of S190923y, the high-voltage of MAXI/GSC was on. \nThe instantaneous field of view of GSC at the GW trigger time covered 3% of the 90% credible region \nof the bayestar sky map, in which we found no significant new X-ray source. \nThe first one-orbit (92 min) scan observation with GSC after the event covered 90% \nof the 90% credible region of the bayestar skymap from 12:55:59 to 14:27:58 UTC (T0+0 to T0+5519 sec). \n\nNo significant new source was found in the region in the one-orbit scan observation. \nA typical 1-sigma averaged upper limit obtained in one scan observation \nis 20 mCrab at 2-20 keV. \n\nIf you require information about X-ray flux by MAXI/GSC at specific coordinates, \nplease contact the submitter of this circular by email.",
  "circularId": 25817,
  "createdOn": 1569250500000,
  "email": "negoro.hitoshi@nihon-u.ac.jp",
  "subject": "LIGO/Virgo S190923y: Coverage and upper limits from MAXI/GSC observations",
  "submitter": "Hitoshi Negoro at Nihon U  <negoro.hitoshi@nihon-u.ac.jp>",
  "eventId": "LIGO/Virgo S190923y"
}