TITLE: GCN CIRCULAR NUMBER: 11641 SUBJECT: GRB 110205A: optical flare confirmation DATE: 11/02/05 08:54:23 GMT FROM: Alexei Pozanenko at IKI, Moscow M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), A. Pozanenko (IKI) on behalf of larger GRB follow up collaboration report: We observed field of the Swift GRB 110205A (Beardmore et al, GCN 11629) with Zeiss-600 telescope of Mt.Terskol observatory in R,V filters starting on Feb. 05 (UT) 02:16. We clearly detect optical afterglow (Beardmore et al, GCN 11629, Klotz et al, GCN 11630, Schaefer et al, GCN 11631, Mundell et al, GCN 11633) and confirm the optical flare at ~ 1140 s (Schaefer et al, GCN 11631, Klotz et al, GCN 11632, Chester et al, GCN 11634) with maximal brightness R ~ 13.7. The finding chart and preliminary light curves can be found at http://grb.rssi.ru/GRB110205A/