{
  "bibcode": "2008GCN..7869....1R",
  "body": "V. Rumyantsev (CrAO),  A. Pozanenko (IKI) report on behalf of larger GRB\nfollow-up collaboration:\n\nWe observed the field of  Swift GRB 080603b (Mangano et al., GCN 7794)  on\nJune 06 betwen (UT) 19:20:31 - 20:27:07  with Zeiss-1000 (Simeiz) telescope\nof  CrAO observatory with favorable weather conditions. We do not detect\noptical afterglow (Rujopakarn, et al., GCN 7792) in a combined image  of\nR-band up to 22.5 (3sigma). A photmetry is obtained in comparison with\nnearby USNOB-1.0 stars:\n\nUT,       Exposure,   UL\n(mid time)\n\n3.011 d   33x120 s    22.5 (3sigma)\n\nThe message may be cited.",
  "circularId": 7869,
  "createdOn": 1213226992000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 080603b: optical observation",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 080603B"
}