{
  "bibcode": "2009GCN.10260....1N",
  "body": "H. Nakajima, Y. Yatsu, Y.A. Mori, A. Endo, T. Shimokawabe, and\nN. Kawai (Tokyo Tech)  report on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 091208B (Pagani et al., GCN 10256)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the MITSuME 50cm telescope at Akeno, Japan.\nThe observation started at 2009-12-08 09:50:45 UT, 48s after the\ntrigger.  We detected the optical afterglow (de Ugarte Postigo et al.\nGCN 10255, Pagani et al. GCN 10256, Yoshida et al. GCN 10258)\nin all the three bands.\n\nThe preliminary photometry results of the OT are listed below. We\nused GSC2.3 catalog for flux calibration.\n\n MID-UT    T-EXP    g'         Rc            Ic\n------------------------------------------------------------------\n 09:51:15  60.0   17.2 \u001b$B!^\u001b(B 0.2  16.1 \u001b$B!^\u001b(B 0.1  15.5 \u001b$B!^\u001b(B 0.1\n------------------------------------------------------------------",
  "circularId": 10260,
  "createdOn": 1260279294000,
  "email": "nkawai@hp.phys.titech.ac.jp",
  "subject": "GRB 091208B:  MITSuME Akeno Optical Observation",
  "submitter": "Nobuyuki Kawai at Tokyo Tech  <nkawai@hp.phys.titech.ac.jp>",
  "eventId": "GRB 091208B"
}