{
  "bibcode": "2013GCN.14498....1K",
  "body": "D. Kuroda, (OAO, NAOJ), H. Hanayama (IAO, NAOJ), K. Yanagisawa,\nY. Shimizu, H. Toda (OAO, NAOJ), T. Miyaji J. Watanabe, (IAO, NAOJ),\nS.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)\nand N. Kawai(Tokyo Tech) report 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 MITSuME 50cm telescope of Okayama Astrophysical Observatory\nand 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. Photometric results of the OT are listed below.\nWe used SDSS catalog for flux calibration.\n\nOkayama Astrophysical Observatory:\nThe observation started on 2013-04-28 11:29:25 UT (~1.15 days after the burst).\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'   g'_err Rc    Rc_err Ic    Ic_err\n-----------------------------------------------------------------------\n1.16123    11:40:06    1440.0    18.4   0.2   17.9   0.1   17.7   0.1\n------------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]\n\nIshigakijima Astronomical Observatory:\nThe observation started on 2013-04-28 14:02:08 UT (~1.26 days after the burst).\n#T0+[day]  MID-UT    T-EXP[sec]   g'   g'_err  Rc   Rc_err  Ic   Ic_err\n-----------------------------------------------------------------------\n1.31290    15:18:30    1020.0    18.61 0.06   18.22 0.04   17.37 0.05\n------------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 14498,
  "createdOn": 1367215575000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130427A: MITSuME Okayama and Ishigakijima Optical Observation after 1 day",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130427A"
}