{
  "bibcode": "2015GCN.18447....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 and OISTER collaboration:\n\nWe observed the field of GRB 151022A (D'Avanzo et al., GCNC 18436)\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 2015-10-22 14:08:12 UT (~100 sec after the burst).\nWe did not find any new point source within the enhanced XRT circle\n(Beardmore et al., GCNC 18444) in all the three bands.\n\nThree sigma upper limits of the OT are listed below.\nWe used SDSS-DR8 catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'    Rc     Ic\n-----------------------------------------------------\n0.00471    14:13:19     540.0   >19.0  >19.0  >18.3\n0.04291    15:08:20    6240.0   >20.1  >19.9  >19.1\n-----------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 18447,
  "createdOn": 1445561598000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 151022A: MITSuME Okayama upper limits",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 151022A"
}