{
  "bibcode": "2015GCN.18702....1M",
  "body": "Y.Muraki, T.Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana,\nY.Yano, S.Harita, Y. Yatsu, and N. Kawai (Tokyo Tech)\n\nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 151215A (S. L. Gibson et al., GCN Circular #18691) 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 2015-12-15 16:23:38 UT (~13.4 h after the burst).\nWe did not find any new point source within Swift/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-------------------------------------------------------------\n48230  17:48:09  5070  > 20.9  > 20.6  > 19.6\n-------------------------------------------------------------\nT0+ : Elapsed time after the burst \nT-EXP: Total Exposure time \nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 18702,
  "createdOn": 1450264421000,
  "email": "yoshii.t.ac@m.titech.ac.jp",
  "subject": "GRB 151215A: MITSuME Akeno optical upper limits",
  "submitter": "Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac@m.titech.ac.jp>",
  "eventId": "GRB 151215A"
}