{
  "bibcode": "2010GCN.11075....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 100807A (Grupe et al., GCN 11067)\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 2010-08-07 13:29:46 UT (~4.3 h after\nthe burst). We did not find any new point source within the\nenhanced XRT error circle (Osborne et al., GCNC 11070) in all\nthe three bands. We could not detect the previously reported\nafterglow (Cenko, GCN 11073).\n\nThree sigma upper limits of the OT are listed below. We used\nGSC 2.3 catalog for flux calibration.\n\n\nT0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic\n------------------------------------------------------\n0.21418    14:21:39  4620.0     >20.1  >19.7  >19.1\n------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 11075,
  "createdOn": 1281256616000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB100807A: MITSuME optical upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 100807A"
}