TITLE: GCN CIRCULAR NUMBER: 9612 SUBJECT: GRB 090529: CrAO optical upper limit DATE: 09/07/03 22:27:56 GMT FROM: Alexei Pozanenko at IKI, Moscow D. Shakhovkoy, V. Rumyantsev (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration: We observed the field of the Swift GRB 090529 (Sakamoto et al. GCN 9430) with AZT-11 telescope of CrAO between (UT) May 29 18:41 -- 19:42 under poor weather conditions. We do not detect optical afterglow (Xin et al. GCN 9431). Upper limit of a stacked image based on USNO-B1.0 star (RA=14 09 47.65 Dec=+24 27 44.30) assuming I=17.54 is following: T0+ Filter, Exposure, mag. (d) (s) 0.2075 I 20x180 > 20.3