{
  "bibcode": "2018GCN.22732....1I",
  "body": "R. Itoh, K. L. Murata, Y. Tachibana, S. Harita, K. Morita, T. Ozawa, H. Mamiya,\nK. Shiraishi, Y. Yatsu, and N. Kawai (Tokyo Tech)\nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 180514A\n(LaPorte et al., GCN Circular #22723)\nwith the optical three color (g', Rc, and Ic) CCD cameras attached to\nthe MITSuME 50cm telescope of Akeno Observatory, Yamanashi, Japan.\n\nThe observation started on 2018-05-14 13:39:12 UT.\nWe did not find any point source at the position of the XRT error\ncircle in all three bands. We obtained following limits for the magnitudes.\n\nT0+[min]    MID-UT      T-EXP[sec]    g'       Rc        Ic\n-------------------------------------------------------------------------------------------------------\n~13.6      14:18:59  4,200   >18.7   >19.2   >18.1\n-------------------------------------------------------------------------------------------------------\n\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used UCAC-4 catalog for flux calibration.",
  "circularId": 22732,
  "createdOn": 1526346334000,
  "email": "itoh@hp.phys.titech.ac.jp",
  "subject": "GRB 180514A: MITSuME Akeno optical upper limits",
  "submitter": "Ryosuke Itoh at Tokyo Institute of Tech.  <itoh@hp.phys.titech.ac.jp>",
  "eventId": "GRB 180514A"
}