TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2005 SUBJECT: GRB030329: Optical observations DATE: 03/03/29 23:08:58 GMT FROM: Vasilij Rumjantsev at CrAO V.Rumyantsev, E.Pavlenko, Y.Efimov, K.Antoniuk, O.Antoniuk, N.Primak (CrAO) and A.Pozanenko (IKI) report: We have observed the GRB030329 (HETE #2652) and OT of the GRB found by B.A. Peterson and P.A. Price (GCN 1985) with Cassegrain 38-cm telescope of CrAO. Several 180 sec. exposures of R (Johnson) filter were obtained. The photometry of the OT in respect to the star of USNO á2.0 - 1050-6351075 (the star A in the figure in http://grb.rssi.ru/GRB030329/030329_030329_at64.gif) is following: Star A (USNO á2.0 - 1050-6351075) RA =10 44 54.49 DEC=+21 34 29.8 R=14.00 B=14.90 JD Hel = 52728.2293 delR=0.17 .2318 delR=0.26 .2349 delR=0.23 .2397 delR=0.27 The figure of the OT can be found in http://grb.rssi.ru/GRB030329/030329_030329_at64.gif Preliminary results of photometry with AZT-11 telescope of CrAO are following: start (JD) 52728.26714 end (JD) 52728.31593 Date JD U B V R I 52728.2932 14.25 14.95 14.49 14.02 13.65 52728.2932 0.018 0.019 0.030 0.017 0.027 error CrAO telescopes will continue to monitor the OT. This message may be cited.