TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3774 SUBJECT: GRB050803, optical observations DATE: 05/08/06 04:53:17 GMT FROM: T.P. Prabhu at Indian Astro. Obs. S. Ramya, D.K. Sahu, P.S. parihar and T.P. Prabhu communicate on behalf of a larger GRB collaboration group: The field of GRB050803 was observed with the 2-m Himalayan Chandra Telescope of Indian Astronomical Observatory, Hanle, on 2005 August 3, 20:30 UT (300s+600s+600s) and 22:18 UT (600s). The extended object mentioned in GCN 3753, 3760, 3763 is the brightest source in the XRT error box. Its magnitude with respect to USNO B1.0 star 0957-0591541 (R=19.31) was constant at R=20.9+/-0.1 mag at both the epochs. This message may be cited.