{
  "bibcode": "2016GCN.18968....1K",
  "body": "D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ),\nK. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima),\nK. Ohta (Kyoto) and N. Kawai(Tokyo Tech)\nreport on behalf of the MITSuME and OISTER collaboration:\n\nWe observed the field of GRB 160131A (Pagani and Barthelmy, GCNC 18951)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the Murikabushi 1m telescope of Ishigakijima Astronomical\nObservatory.\n\nThe observation started on 2016-01-31 14:06:17 UT (~5.8 h afterthe burst).\nWe detected the previously reported afterglow (Pagani and Barthelmy, GCNC 18951;\nYurkov et al., GCNC 18952; Guidorzi et al., GCNC 18953) in all the three bands.\n\nPhotometric results of the OT are listed below.\nWe used GSC2.3 catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'   g'_err  Rc   Rc_err  Ic   Ic_err\n-----------------------------------------------------------------------\n0.24373    14:11:29     540.0    17.92 0.09   17.19 0.05   16.88 0.06\n-----------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 18968,
  "createdOn": 1454292316000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 160131A: MITSuME Ishigakijima Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 160131A"
}