{
  "bibcode": "2016GCN.18817....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 160104A (A. Melandri et al., GCN \nCircular #18815) with the optical 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 2016-01-04 11:24:56 UT (46 sec after the burst) and \nwe detected the optical counterpart in Rc and Ic band.\nThe measured magnitudes were listed as follows.\n\nWe obtained following limits for the magnitudes.\n\nT0+[sec]    MID-UT      T-EXP[sec]         g'              Rc                      Ic\n-------------------------------------------------------------------------------------------------------\n61            11:25:11             30            > 18.5        17.9 +/- 0.3        16.5 +/- 0.2 \n-------------------------------------------------------------------------------------------------------\n\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 18817,
  "createdOn": 1451910519000,
  "email": "yoshii.t.ac@m.titech.ac.jp",
  "subject": "GRB 160104A: MITSuME Akeno Optical Observation",
  "submitter": "Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac@m.titech.ac.jp>",
  "eventId": "GRB 160104A"
}