{
  "bibcode": "2013GCN.14534....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 130427A (Masell et al., GCNC 14448)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the Murikabushi 1m telescope of Ishigakijima Astronomical\nObservatory.\n\nWe detected the previously reported afterglow (Elenin et al., GCNC 14450)\nin only Rc-band. The observation started on 2013-05-02 13:08:42 UT\n(~5.2 days after the burst).\n\nPhotometric result and three sigma upper limits of the OT are listed below.\nWe used SDSS catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'   Rc   Rc_err  Ic\n---------------------------------------------------------\n5.25248    13:51:30    540.0    >20.7  20.3 0.3   >19.1\n---------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 14534,
  "createdOn": 1367539846000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130427A: MITSuME Ishigakijima Optical Observation after 5 days",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130427A"
}