TITLE: GCN CIRCULAR NUMBER: 14585 SUBJECT: GRB 130505A: optical observations DATE: 13/05/06 02:27:34 GMT FROM: Alexei Pozanenko at IKI, Moscow Yu. Krugly (IA KhNU), I. Slyusarev (IA KhNU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger collaboration: We observed a filed of the Swift GRB 130505A (Cannizzo et al. GCN 14563) with 0.7m telescope of Institute of Astronomy, Kharkiv National University between May 05 (UT) 20:52:35 - 21:19:57. A set of images of 180 s were taken in R-filter. In the combined image we clearly detect optical afterglow (Cannizzo et al., GCN 14563; Tanvir et al., GCN 14567; Kuroda et al., GCN 14568). Preliminary photometry is based on the nearby SDSS stars: T_start (UT) T0+ Filter Exp. OT mid,days s mag 2013-05-05T20:52:35 0.5309 R 8x180 19.4 +/- 0.07