TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2054 SUBJECT: GRB 030329: beginning of the new fading phase in optical band DATE: 03/04/01 00:47:11 GMT FROM: Denis Denissenko at IKI, Moscow R. Burenin, R. Sunyaev, D. Denissenko, M. Pavlinsky, O. Terekhov, A. Tkachenko (IKI); Z. Aslan, K. Uluc, I. Khamitov (TUG); U. Kiziloglu, A. Alpar, A. Baykal (METU); I. Bikmaev, N. Sakhibullin, V. Suleymanov (KSU) report: We continue observations of the GRB 030329 optical afterglow (Peterson and Price, GCN 1985) with 1.5-m Russian-Turkish Telescope RTT150 at Bakyrlytepe. Assuming that star "A" has R=16.20 we have measured the following magnitudes: t-t0,hours UT R 54.3 March 31.75 16.91 55.2 31.78 16.92 57.1 31.86 16.99 We see the beginning of new phase of fading of the optical afterglow. This message may be cited.