{
  "bibcode": "2013GCN.14513....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 all the three bands. The observation started on 2013-04-29 15:02:55 UT (~2.30\ndays after the burst).\n\nPhotometric results of the OT are listed below.\nWe used SDSS catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'   g'_err  Rc   Rc_err  Ic   Ic_err\n-----------------------------------------------------------------------\n2.31262    15:18:06   1500.0     19.19 0.05   18.87 0.04   18.65 0.09\n2.33383    15:48:38   1440.0     19.29 0.06   18.90 0.05   18.76 0.11\n------------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 14513,
  "createdOn": 1367332392000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130427A: MITSuME Ishigakijima Optical Observation after 2 days",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130427A"
}