{
  "createdOn": 1697951519199,
  "submitter": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
  "body": "H. Hiramatsu, S. Sugita, M. Serino, H. Nishikawa, Y. Kondo (AGU),\nN. Kawai (RIKEN), H. Negoro, M. Nakajima (Nihon U.),\nT. Mihara (RIKEN),\nY. Kawakubo (LSU)\nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter compact binary merger candidate S231021az at 2023-10-21 23:37:57 UTC .\n\nAt the trigger time of S231021az, the high-voltage of MAXI/GSC was on.\nThe instantaneous field of view of GSC at the GW trigger time covered 1% 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 86%\nof the 90% credible region of the bayestar skymap from 23:37:57 to 01:09:53 UTC (T0+0 to T0+5516 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. ",
  "eventId": "LIGO/Virgo/KAGRA S231021az",
  "submittedHow": "web",
  "circularId": 34871,
  "subject": "LIGO/Virgo/KAGRA S231021az: Coverage and upper limits from MAXI/GSC observations",
  "bibcode": "2023GCN.34871....1H"
}