{
  "bibcode": "2009GCN..9853....1K",
  "body": "K.Kono, A.Daikyuji, E.Sonoda, N.Ohmori, H.hayasi,\nK.Noda, Y.Nisioka, M.Yamauchi\n(University of Miyazaki)\n\nWe have observed the field covering the error circle of\nGRB 090831B (Swift trigger 361477, GCN 9851, M. De Pasquale et al.)\nwith the unfiltered CCD camera on the 30-cm telescope\nat University of Miyazaki.\nThe observation was started 18:03:42 UT, about 2.5 min\nafter the Swift trigger time.\nWe have compared our data of 30 sec exposures\nwith the USNO-A2.0 catalog,\nThere is no new source at the reported position.\n(GCN 9851, M. De Pasquale et al.)\n\nthe upper limits are as follows:\n--------------------------------------------------------------\nStart(UT) End(UT) Num. of frames Limit (mag.)\n--------------------------------------------------------------\n18:03:42    18:04:12         1            15.4\n18:03:42    18:40:05        27            17.2\n---------------------------------------------------------------",
  "circularId": 9853,
  "createdOn": 1251748954000,
  "email": "kenta0514@astro.miyazaki-u.ac.jp",
  "subject": "GRB 090831B, RIMOTS optical upper limits",
  "submitter": "Kenta Kono at Miyazaki U  <kenta0514@astro.miyazaki-u.ac.jp>",
  "eventId": "GRB 090831B"
}