{
  "bibcode": "2012GCN.13224....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 120404A (Stratta et al., GCNC 13208)\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  2012-04-04 17:41:39 UT (~4.8 h after the\nburst). We detected the previously reported afterglow (Guidorzi et al.,\nGCNC 13209) in Rc and Ic bands.\n\nPhotometric results of the OT are listed below. We used SDSS catalog\nfor flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc  Rc_err    Ic  Ic_err\n----------------------------------------------------------------------\n0.24381    18:42:07   5760.0    >20.4   20.2  0.3     19.1  0.2\n----------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 13224,
  "createdOn": 1333617434000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 120404A: MITSuME Okayama Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 120404A"
}