{
  "bibcode": "2017GCN.22128....1M",
  "body": "K. Morita, R. Itoh, K. L. Murata, T. Yoshii, Y. Tachibana, S. Harita, 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 171115A (B. Sbarufatti et\nal., GCN Circular #22124) 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 2017-11-16 08:54:06 UT. We did not find any new\npoint source within enhanced XRT circle (A.P. Beardmoreet al., GCN Circular\n#22125) in all three bands.\n\nWe obtained following limits for the magnitudes.\n\nT0+[hour]    MID-UT      T-EXP[sec]    g'       Rc        Ic\n-------------------------------------------------------------------------------------------------------\n~14.05       09:14:00.87     2220     >19.6     >18.6     >18.1\n-------------------------------------------------------------------------------------------------------\n\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 22128,
  "createdOn": 1510835565000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "GRB 171115A: MITSuME Akeno optical upper limits",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>",
  "eventId": "GRB 171115A"
}