{
  "bibcode": "2012GCN.12825....1K",
  "body": "We carried out a detailed analysis of GRB 120106A and found the optical\nafterglow in only Ic-band. This results indicated the possibility of\na Rc-band dropout.\nAlthough we reported the three sigma upper limits in the previous circular\n(Kuroda et al., GCNC 12814), we updated our results as follows.\n\nThree sigma upper limits and photometric result of the OT are listed below.\nWe used GSC2.3 catalog for flux calibration.\n\nT0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic  Ic_err\n-----------------------------------------------------------\n0.00400    14:22:10     540.0    >19.3  >19.4  19.1  0.3\n-----------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 12825,
  "createdOn": 1326215124000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 120106A: MITSuME Okayama Optical Observation (update)",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 120106A"
}