TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1535 SUBJECT: XRF 020903: Optical observations DATE: 02/09/05 12:55:58 GMT FROM: Vasilij Rumjantsev at CrAO E.Pavlenko (CrAO), V.Rumyantsev (CrAO) and A.Pozanenko (IKI) report: We have imaged of the error box of XRF 020903 (Ricker et al. GCN #1530) with the 0.38-m Cassegrain telescope of Crimean Astrophysical Observatory (field 7x10 arcminutes). We obtained several frames which include the center of error box and partially covered its area on 2002 Sept. 3.9203 (12h after the burst) - 3.9540 UT. We did not identify any afterglow candidate by visual comparison with the DSS2 to a limit approximately R ~ 17.4 mag. Images will by posted shortly in http://grb.rssi.ru/XRF020903. This message may be cited.