TITLE: GCN CIRCULAR NUMBER: 12246 SUBJECT: GRB 110801A: optical observations in CrAO DATE: 11/08/04 15:56:39 GMT FROM: Alexei Pozanenko at IKI, Moscow V. Rumyantsev (CrAO), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed the field of GRB 110801A (Pasquale et al. GCN 12228) with Shajn telescope of CrAO observatory on between Aug. 2 (UT) 22:03 and Aug. 3 (UT) 00:27 under variable weather conditions and a mean seeing of 2.1 arsces. We took several frames with exposure of 60 s in R-band. On a stacked image we detected the optical counterpart (Pasquale et al. GCN 12228, Zheng et al. GCN 12229). A photometry is based on the USNO B1.0 star 1709-0023450 (05 57 24.91 +80 57 39.8) assuming R=15.73. T0+ Filter, Exposure, mag. uplim (3 sigma) (mid, d) (s) 1.1428 R 74x60 21.60 +/- 0.09 23.2