{
  "bibcode": "2016GCN.19495....1S",
  "body": "Y. Saito, Y. Tachibana, T. Yoshii, T. Fujiwara, Y. Ono, Y. Muraki, S. Harita, \nT, Ozawa, K. Saisho, Y. Yatsu, and N. Kawai (Tokyo Tech) \nreport on behalf of the MITSuME collaboration:\n\nWe searched for the optical counterpart of GRB 160601A (D. Kocevski et al., GCN Circular #19478) \nwith theoptical three color (g', Rc, and Ic) CCD cameras attached to the \nMITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.\n\nThe observation started on 2016-06-01 23:43:35 UT (33 sec 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\n\nT0+[day]     MID-UT      T-EXP[sec]          g'           Rc            Ic \n------------------------------------------------------------------------------------------\n0.078          16:35:35        12060        >21.7         >21.1         >19.9    \n------------------------------------------------------------------------------------------\nT0+ : Elapsed time after the burst.\nT-EXP: Total Exposure time.\nWe used GSC2.3 catalog for flux calibration.",
  "circularId": 19495,
  "createdOn": 1464936267000,
  "email": "yoshii.t.ac@m.titech.ac.jp",
  "subject": "GRB 160601A: MITSuME Akeno optical upper limits",
  "submitter": "Taketoshi Yoshii at Tokyo Tech  <yoshii.t.ac@m.titech.ac.jp>",
  "eventId": "GRB 160601A"
}