{
  "bibcode": "2012GCN.13855....1V",
  "body": "A. Volnova (SAO MSI, IKI), A. Matkin (UAFO, ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:\n\nWe observed the field of the Swift GRB 121011A (Racusin et al., GCN 13845) with VT-50 (0.5-m) telescope of UAFO/ISON-Ussuriysk observatory starting on Oct. 11 (UT) 11:21:29, i.e. 6 minutes after burst trigger. We took several unfiltered images of 30 s exposures ending observations on (UT) 12:17:00. In initial frames we clearly detect afterglow (Racusin et al., GCN 13845). Preliminary photometry of some early images is based on USNO-B1.0 stars (R2):\n\nT_start T0+, Filter, exposure, OT \n(UT) mid (d) (s) \n\n11:21:29 0.00433 none 30 16.70 +/- 0.08\n11:27:04 0.00821 none 30 16.64 +/- 0.07\n11:33:14 0.01249 none 30 16.80 +/- 0.10\n11:38:12 0.01594 none 30 17.30 +/- 0.10",
  "circularId": 13855,
  "createdOn": 1349994761000,
  "email": "alex@grb.rssi.ru",
  "subject": "GRB 121011A: optical observations",
  "submitter": "Alexei Pozanenko at IKI  <alex@grb.rssi.ru>",
  "eventId": "GRB 121011A"
}