{
  "bibcode": "2012GCN.12798....1R",
  "body": "V. Rumyantsev, (CrAO), A. Pozanenko (IKI)  report on behalf of larger GRB \nfollow-up collaboration:\n\nWe observed the field of GRB 111128A (Ukwatta  et al. GCN  12737) with Shajn \ntelescope of CrAO observatory between (UT) 2011-12-28T23:08:08 and \n2011-12-29T01:04:41  under a mean seeing of 1.5\". We took several frames \nwith exposure of 60 s in BVRI. The photometry optical afterglow (Ukwatta  et \nal. GCN  12737; Xin et al. GCN 12738) is based on the USNO B1.0 star \n1083-0199833 (10 00 22.70 +18 19 23.5) assuming B=18.85, R=17.28, I=17.02\n.\n      T0+        Filter, Exposure, OT,  uplim (3 sigma)\n    (mid, d)            (s)\n\n0.3476     B       27x60      19.270 +/- 0.007  23.6\n0.3491     R       27x60      18.710 +/- 0.005  23.5\n0.3499     I        27x60      18.608 +/- 0.006  23.2",
  "circularId": 12798,
  "createdOn": 1325515947000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 111228A: optical observations in CrAO",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 111228A"
}