TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4900 SUBJECT: GRB060218/SN2006aj: optical observations DATE: 06/03/22 00:45:36 GMT FROM: Alexei Pozanenko at IKI, Moscow D. Sharapov (MAO, and NOT, La Palma), A. Pozanenko (IKI), and M. Ibrahimov (MAO) on behalf of larger GRB follow up collaboration report: We have observed GRB060218/SN 2006aj (Cusumano et al. GCN 4775) with Maidanak 1.5m telescope in BVR on Feb.27, Mar.08, and in BR bands with NOT/StanCam on Mar.15. The following photometry is based on Modjaz, et. al. (2006, astro-ph/0603377) calibration and the same reference stars in each epochs: Mid time (UT), B, V, R Feb.27.63 18.08 (.01) 17.40 (.01) 17.21 (.01) Mar.08.66 18.98 (.02) 17.83 (.02) 17.39 (.01) Mar.15.86 19.66 (.03) - 17.84 (.02) Only measurement errors are presented. The photometry is preliminary, reduction and observations are continuing. Our observations confirm a maximum of the light curve (Modjaz, et. al. 2006, astro-ph/0603377) between Feb.27 and Mar.08. It is also evident gradual reddening of the SN. The message may be cited.