{
  "bibcode": "2010GCN.11212....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 100901A (Immler et al., GCN 11159)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the Murikabushi 1m telescope of Ishigakijima Astronomical\nObservatory.\nThe observation started on 2010-09-04 17:11:19 UT (~3.15 day after the\nburst). We detected the previously reported afterglow (Immler et al.,\nGCN 11159; Guidorzi et al., GCN 11160; Kuroda et al., GCN 11205)\nin g' and Rc bands.\n\nPhotometric results and three sigma upper limit of the OT are listed\nbelow. We used SDSS catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err   Rc  Rc_err   Ic\n----------------------------------------------------------------------\n3.15442    17:16:32   540.0      21.1  0.2    20.6  0.2    >20.1\n----------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 11212,
  "createdOn": 1283694368000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB10901A: Murikabushi telescope observation at 3 days after the burst",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>"
}