TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4847 SUBJECT: GRB 060218: RTT150 optical observations DATE: 06/03/02 19:13:25 GMT FROM: Rodion Burenin at IKI, Moscow R. Burenin, A. Mescheryakov, M. Pavlinsky, R. Sunyaev (IKI), I. Khamitov, Z. Aslan (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.), I. Bikmaev, N. Sakhibullin (KSU/AST) report: We observed GRB 060218/SN 2006aj (Cusumano et al., GCN 4775) with Russian-Turkish 1.5-m telescope (RTT150, Bakirlitepe, TUBITAK National Observatory, Turkey) over 3 nights in BVRI. The magnitudes of the object are: Time (UT) B V R I Feb 21.84 18.49 - 17.82 17.53 Feb 22.75 18.20 17.80 17.62 17.40 Feb 25.75 17.98 17.57 17.30 16.89 The photometry is preliminary and is based on our observations of Landolt stars in these and previous nights. This message may be cited.