{
  "bibcode": "2013GCN.14562....1K",
  "body": "D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ),\nS. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)\nand N. Kawai(Tokyo Tech)\nreport on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 130504A (Cummings et al., GCNC 14551)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the MITSuME 50cm telescope of Okayama Astrophysical Observatory.\n\nThe observation started on 2013-05-04 15:09:24 UT (~13.1 h after the burst).\nWe did not find any new point source within the enhanced XRT circle\n(D'Avanzo et al., GCNC 14558) 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'     Rc     Ic\n-----------------------------------------------------\n0.58630    16:09:50    6360.0   >19.9  >19.7  >18.6\n-----------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 14562,
  "createdOn": 1367720191000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130504A: MITSuME Okayama upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130504A"
}