{
  "bibcode": "2018GCN.22340....1M",
  "body": "K. L. Murata, R. Itoh,T. Yoshii, Y. Tachibana, S. Harita, K. Morita, T.\nOzawa, H. Mamiya, K. Shiraishi, Y. Yatsu, and N. Kawai (Tokyo Tech)\nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 180115A (Cannizzo et al.,\nGCN Circular #22335) with the optical three color (g', Rc, and Ic) CCD\ncameras attached to the MITSuME 50 cm telescope of Akeno Observatory,\nYamanashi, Japan.\n\nThe observation started on 2018-01-15 09:25:40 UT. We did not find the\npreviously reported candidate afterglow (Cannizzo et al., GCN Circular\n#22335) in all three bands.\nWe obtained following limits for the magnitudes.\n\nT0+[hour]    MID-UT      T-EXP[sec]    g'       Rc        Ic\n-------------------------------------------------------------------------------------------------------\n~5.16       10:06:44      4320       >19.8    >19.6     >19.0\n-------------------------------------------------------------------------------------------------------\n\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 22340,
  "createdOn": 1516016574000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "GRB 180115A: MITSuME Akeno optical upper limits",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>",
  "eventId": "GRB 180115A"
}