{
  "bibcode": "2009GCN.10273....1A",
  "body": "M.Andreev,  A.Sergeev, N.Parakhin, N.Karpov (Terskol Branch of  Institute of \nAstronomy), Yu. Kuznietsova (Main Astronomical Observatory NASU), V.Petkov \n(Baksan Neutrino Observatory INR) and A. Pozanenko (IKI) on behalf of larger \nGRB follow up collaboration report:\n\nWe observed the field of the Swift GRB 091208B (Pagani  et al. GCN  10256) \nwith the Z-600 telescope of Mt.Terskol observatory in R-filter  on  Dec. 08 \nstarting at (UT) 15:40. In combined images we  detect the optical afterglow \n(Ugarte Postigo et al. GCN 10255, Pagani  et al. GCN  10256).\n\nPreliminary photometry is based on the USNO-B1.0 reference star \n#1069-0020318  assuming  R2=17.47:\n\nUT     Filter, Exposure, mag.  err.\n(mid)             (s)\n\n16:10  R  30x120  20.15  0.25\n18:11  R  30x120  20.60  0.25\n19:11  R  30x120  20.9    0.3\n20:19  R  30x120  21.0    0.3\n\nCombined image can be found in\nhttp://grb.rssi.ru/GRB091208B/GRB091208B_Terskol600_R.jpg",
  "circularId": 10273,
  "createdOn": 1260361959000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 091208B: optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 091208B"
}