{
  "bibcode": "2015GCN.18415....1H",
  "body": "S.Harita, T.Fujiwara, T. Yoshii, Y. Saito, Y. Tachibana, H. Ohuchi, Y. Yano,\nS. Kurita, Y.Ono, Y.Muraki, Y. Yatsu, and N. Kawai (Tokyo Tech)\n\n\nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 151006A (D. Kocevski et al. GCN Circular #18398) with the\noptical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.\n\nThe observation started on 2015-10-06 15:20:15 UT (~4.4 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---------------------------------------------------------------------------------------\n  19514     17:24:12.2          9240           >21.3      >20.8     > 19.9\n---------------------------------------------------------------------------------------\nT0+ : Elapsed time after the burst\nT-EXP: Total Exposure time\nWe used GSC2.3 catalog for flux calibration",
  "circularId": 18415,
  "createdOn": 1444397859000,
  "email": "yoshii.t.ac@m.titech.ac.jp",
  "subject": "GRB 151006A: MITSuME Akeno optical upper limits",
  "submitter": "Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac@m.titech.ac.jp>",
  "eventId": "GRB 151006A"
}