{
  "circularId": 33823,
  "subject": "LIGO/Virgo/KAGRA S230518h: Coverage and upper limits from MAXI/GSC observations",
  "submitter": "Motoko Serino at Aoyama Gakuin U. <serino@phys.aoyama.ac.jp>",
  "eventId": "LIGO/Virgo/KAGRA S230518h",
  "body": "M. Serino, S. Sugita (AGU),\nH. Negoro (Nihon U.),\nN. Kawai (RIKEN), \nM. Nakajima, K. Kobayashi, M. Tanaka, Y. Soejima, Y. Kudo (Nihon U.),\nT. Mihara, T. Kawamuro, S. Yamada, T. Tamagawa, M. Matsuoka (RIKEN),\nT. Sakamoto, H. Hiramatsu, H. Nishikawa, A. Yoshida (AGU),\nY. Tsuboi, S. Urabe, S. Nawa, N. Nemoto (Chuo U.),\nM. Shidatsu (Ehime U.),\nI. Takahashi, M. Niwano, S. Sato, N. Higuchi, Y. Yatsu (Tokyo Tech),\nS. Nakahira, S. Ueno, H. Tomida, M. Ishikawa, S. Ogawa, T. Kurihara (JAXA),\nY. Ueda, K. Setoguchi, T. Yoshitake, Y. Nakatani (Kyoto U.),\nM. Yamauchi, Y. Hagiwara, Y. Umeki, Y. Otsuki (Miyazaki U.),\nK. Yamaoka (Nagoya U.),\nY. Kawakubo (LSU),\nM. Sugizaki (NAOC),\nW. Iwakiri (Chiba U.) \nreport on behalf of the MAXI team:\n\nWe examined MAXI/GSC all-sky X-ray images (2-20 keV)\nafter the compact binary merger candidate S230518h at 2023-05-18 12:59:08.167 UTC (GCN 33813).\n\nAt the trigger time of S230518h, the high-voltage of MAXI/GSC was on,\nbut the FOV was out of the 90% credible region of the bayestar skymap.\nThe first one-orbit (92 min) scan observation with GSC after the event covered 70%\nof the 90% credible region of the bayestar skymap from 13:24:45 to 14:16:55 UTC (T0+1537 to T0+4667 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. \n",
  "createdOn": 1684489912989,
  "bibcode": "2023GCN.33823....1S"
}