{
  "bibcode": "2010GCN.11206....1K",
  "body": "D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe(IAO, NAOJ),\nK. Yanagisawa (OAO, NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto)\nand N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 100902A (Sakamoto et al. GCNC 11181)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the Murikabushi 1m telescope of Ishigakijima Astronomical\nObservatory.\n\nThe observation started on 2010-09-03 18:04:55 UT (~0.94 day after the\nburst). We did not find any new point source within the Enhanced\nXRT error circle (Beardmore et al. GCNC 11188) 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\nT0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic\n------------------------------------------------------\n0.94445    18:11:55   720.0      >21.8  >21.4  >20.2\n------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 11206,
  "createdOn": 1283607265000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB100902A: Optical upper limits at IAO",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 100902A"
}