{
  "bibcode": "2008GCN..7668....1M",
  "body": "Y.A. Mori, Y. Kudou, T. Shimokawabe and N. Kawai (Tokyo Tech) report on\nbehalf of the MITSuME collaboration: \n\nWe observed the error box of GRB 080503 (Mao et al. GCN 7665)\nwith the 3-color 50cm MITSuME Telescope at Akeno, Japan starting\nat 2008-05-03 12:31:53 UT, 5.4 min after the trigger.\nIn the co-added images of Ic, Rc, and g' bands, we did not detect\nany afterglow candidate in the XRT error circle.  \nThe 3-sigma limiting magnitudes based on USNO-B1.0 (I-band) and NOMAD\n(R-band,g'-band) stars are following.\n\nFilter  start (UT)  end (UT)    Exposure   LimitMag\n---------------------------------------------------\ng'      12:31:53    12:41:03    9 x 60 s     18.8\nRc      12:31:53    12:41:03    9 x 60 s     19.2\nIc      12:31:53    12:41:03    9 x 60 s     18.1\n----------------------------------------------------",
  "circularId": 7668,
  "createdOn": 1209832516000,
  "email": "nkawai@hp.phys.titech.ac.jp",
  "subject": "GRB 080503: MITSuME Akeno optical upper limits",
  "submitter": "Nobuyuki Kawai at Tokyo Tech  <nkawai@hp.phys.titech.ac.jp>",
  "eventId": "GRB 080503"
}