GCN Circular 1528
G.Beskin, A.Birjukov, S.Koposov, O.Spiridonova (SAO) and A.Pozanenko (IKI) report: We have observed the OT of GRB020813 reported by D. Fox et al. (GCN 1470) with Zeiss-1000 telescope of Special Astrophysical Observatory (SAO). Three R-band images (exposure of each 303 sec) were taken on August 13 between 18:43 - 19:05 UT. Using combined image of the 3 exposures and calibration data provided by A. Henden (GCN 1503) we obtained R magnitude of 19.70 +/- 0.25. The combined image may be found at http://grb.rssi.ru/GRB020813 ================================= R=19.70 +/- 0.25 at UT 18.72 August 13, 2002 ================================= This message may be cited.