{
  "bibcode": "2013GCN.15077....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 MITSuME collaboration:\n\nWe observed the field of GRB 130806A (Gompertz et al., GCNC 15071)\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 2013-08-06 12:29:43 UT (~9.6 h after the burst).\nWe did not find any new point source within the enhanced XRT error circle\n(Beardmore et al., GCNC 15072) in all the three bands.\n\nThree sigma upper limits of the OT are listed below.\nWe used GSC 2.3 catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'     Rc     Ic\n-----------------------------------------------------\n0.54100    15:50:36    4020.0   >19.4  >19.5  >18.7\n-----------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 15077,
  "createdOn": 1375849995000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 130806A: MITSuME Okayama upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 130806A"
}