{
  "bibcode": "2010GCN.10388....1K",
  "body": "D. Kuroda, K. Yanagisawa, Y. Shimizu, S. Nagayama, H. Toda\n(OAO, NAOJ), M. Yoshida (Hiroshima) and N. Kawai (Tokyo Tech)\nreport on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 100206A (Krimm et al. GCN 10376)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the MITSuME 50cm telescope of Okayama Astrophysical Observatory.\nThe observation started on 2010-02-06 13:31:10 UT (65s after the\nburst). We did not find any new point source in the XRT error\ncircle in all the three bands.\n\nThree sigma upper limits of the OT are listed below. We used\nGSC2.3 catalog for flux calibration.\n\nPDAY     MID-UT    T-EXP    g'     Rc     Ic\n---------------------------------------------------\n0.00422  13:36:10   480.0 >19.0  >19.0  >17.9\n0.02166  14:01:17  2940.0 >19.8  >19.8  >18.7\n---------------------------------------------------",
  "circularId": 10388,
  "createdOn": 1265508959000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB100206: MITSuME optical upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 100206"
}