{
  "bibcode": "2014GCN.17091....1K",
  "body": "D. Kuroda (OAO, NAOJ),  H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ),\nK. Yanagisawa (OAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima),\nK. Ohta (Kyoto) and N. Kawai(Tokyo Tech)\nreport on behalf of the MITSuME and OISTER collaboration:\n\nWe observed the field of GRB 141121A (Lien et al., GCNC 17075)\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 2014-11-23 17:42:18 UT (~2.6 days after the burst).\nWe detected the previously reported afterglow (Tanga et al., GCNC 17078;\nPerley et al., GCNC 17081) in all the three bands.\n\nPhotometric results of the OT are listed below.\nWe used SDSS-DR7 catalog for flux calibration.\n\n#T0+[day]  MID-UT    T-EXP[sec]  g'    g'_err  Rc    Rc_err  Ic    Ic_err\n--------------------------------------------------------------------------\n2.61049    18:29:49    4800.0    21.02 0.08    20.44 0.07    19.64 0.09\n--------------------------------------------------------------------------\nT0+ : Elapsed time after the burst [day]\nT-EXP: Total Exposure time [sec]",
  "circularId": 17091,
  "createdOn": 1416793160000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB 141121A: MITSuME Ishigakijima Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 141121A"
}