TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4027 SUBJECT: GRB OT observation DATE: 05/09/23 14:23:26 GMT FROM: Rudolf Novak at N.Copernicus Obs/Czech Rep R. Novak (N. Copernicus Observatory in Brno, Czech Republic), report: We have observed the optical transient of GRB050922C reported by Rykoff et al. (GCN 4011) for 2h with the mean time 0.1d after the GRB trigger (Norris et al., GCN 4013) with the 40cm telescope at N. Copernicus Observatory equipped with an ST7 CCD (with R band filter). We have found the OT as very faint object close to 18 mag. More data reductions will follow. This message may be cited.