{
  "bibcode": "2011GCN.12730....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 111225A (Siegel et al., GCNC 12720)\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 2011-12-25 09:00:08 UT (~5.2 hours\nafter the burst). We did not find any new point source within the\nenhanced XRT error circle (Evans et al., GCNC 12724) and could not\ndetect the previously reported afterglow (Klotz et al., GCNC 12722;\nUpdike et al., GCNC 12723) in g' and Ic bands.\n\nThree sigma upper limits of the OT are listed below. We used\nGSC2.3 catalog for flux calibration.\n\nT0+[day]   MID-UT   T-EXP[sec]    g'     Ic\n------------------------------------------------------\n0.25569    09:58:49  5700.0     >20.2  >19.6\n------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 12730,
  "createdOn": 1324865356000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB111225A: MITSuME Okayama optical upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 111225A"
}