{
  "bibcode": "2015GCN.18765....1S",
  "body": "Y.Saito, T.Fujiwara, T. Yoshii, Y. Tano, Y. Tachibana,\nY.Ono, S.Harita, Y.Muraki, Y. Yatsu, and N. Kawai (Tokyo Tech)\nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 151229A (D. Kocevski et al., GCN Circular #18745) with the\noptical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm\ntelescope of Akeno Observatory, Yamanashi, Japan.\n\nThe observation started on 2015-12-29 08:56:00 UT (~2.1 h after the burst).\nWe did not find any new point source within XRT circle in all three bands.\n\nWe obtained following limits for the magnitudes.\n\nT0+[sec]    MID-UT      T-EXP[sec]           g'            Rc                Ic\n-------------------------------------------------------------------------------------------------\n7533       09:20:52            2700           > 19.5        > 19.4        > 18.6\n-------------------------------------------------------------------------------------------------\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 18765,
  "createdOn": 1451459322000,
  "email": "yoshii.t.ac@m.titech.ac.jp",
  "subject": "GRB 151229A: MITSuME Akeno optical upper limits",
  "submitter": "Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac@m.titech.ac.jp>",
  "eventId": "GRB 151229A"
}