{
  "bibcode": "2013GCN.14280....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 collaboration:\n\nWe observed the field of GRB 130306A (Siegel et al., GCNC 14266)\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 2013-03-07 19:28:07 UT (~19.6 h after the burst).\nWe did not find any new point source within the refined BAT error circle\n(Barthelmy et al., GCNC 14279) in all the three bands.\n\nThree sigma upper limits of the OT are listed below. We used\nGSC2.3(for g' and Rc) and USNO-B1(for Ic) catalog for flux calibration.\n\nT0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic\n------------------------------------------------------\n0.84918    20:13:51    4560.0   >20.6  >19.5  >18.4\n------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 14280,
  "createdOn": 1362903923000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130306A: MITSuME Ishigakijima upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130306A"
}