{
  "bibcode": "2010GCN.11240....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 100906A (Markwardt et al., GCN 11227)\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 2010-09-06 13:53:54 UT (~4.4 min after\nthe burst).  We detected the previously reported afterglow\n(Markwardt et al., GCN 11227; Ivanov et al., GCN 11228; Melandri\net al., GCN 12229) 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'  g'_err   Rc  Rc_err   Ic  Ic_err\n----------------------------------------------------------------------\n0.00662    13:58:60     540.0   15.58  0.04  14.42  0.02  14.00  0.02\n0.01784    14:15:09     540.0   16.52  0.05  15.35  0.03  14.98  0.04\n----------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 11240,
  "createdOn": 1283818012000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB100906A: MITSuME  Okayama Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 100906A"
}