{
  "bibcode": "2012GCN.12814....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 120106A (Immler et al., GCNC 12810)\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 2012-01-06 14:17:12 UT (~48 sec after\nthe burst). We did not find any new point source within the enhanced\nXRT circle (Evans et al., GCNC 12813) in all the three bands.\n\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'     Rc     Ic\n------------------------------------------------------\n0.00400    14:22:10     540.0   >19.3  >19.4  >18.7\n0.04247    15:17:33    6420.0   >20.6  >20.2  >19.6\n------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 12814,
  "createdOn": 1325891014000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 120106A: MITSuME Okayama Optical upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 120106A"
}