TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4718 SUBJECT: GRB060209A: MASTER optical observation DATE: 06/02/09 20:05:54 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy, A.Krylov, G.Borisov, A.Sankovich, G.Antipov, V.Vladimirov M.Sinitsin, P.Gritsyk Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRB060209A (GRB_TIME is 2006-02-09 19:08:55.6). The first image was at 2006-02-09 19:12:52 UT, 235 sec after the GRB time The unfiltered image is calibrated relative to USNO A2.0 (0.8 R + 0.2 B). The robot not find OT-candidate in error box. Our upper limit is about 15.8 m. The reduction is continuing. This work is supported by RFFI 04-02-16411 grant. This message can be cited. Mailto: lipunov@sai.msu.ru