{
  "bibcode": "2010GCN.11166....1A",
  "body": "M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy),   A. \nPozanenko (IKI) on behalf of larger GRB follow up collaboration report:\n\nWe started observation of the Swift GRB 100901A (Immler  et al., GCN 11159) \nwith the Z-600 telescope of Mt.Terskol observatory in R-filter  on   Sep.01 \n(UT) 17:50. In a combined image we clearly detect  the afterglow (Immler et \nal., GCN 11159; Guidorzi et al., GCN 11160; Ivanov et al., GCN 11161; Klunko \net al., GCN 11162).\n\nPreliminary photometry is based on the reference star USNO-B1.0 \n#1127-0027231 RA(J2000) = 01 49 06.78 Dec(J2000) = +22 47 03.3 assuming \nR=15.37:\n\nT0+     Filter, Exposure, OT\n(d)                 (s)\n\n0.1821 R     5x60          17.28 +/-0.03\n\nThe finding chart can be found at\nhttp://grb.rssi.ru/GRB100901A/GRB100901A_R_100901_Terskol.jpg",
  "circularId": 11166,
  "createdOn": 1283367015000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 100901A: optical observation at Mt.Terskol",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 100901A"
}