TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4082 SUBJECT: GRB051011: MASTER optical observation DATE: 05/10/11 03:07:07 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, N.Tyurina, A.Belinski,E.Gorbovskoy, D.Kuvshinov, A.Krylov, G.Borisov, A.Sankovich, V.Vladimirov Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRB051011 at 02:18:22.89. An automated response took the first image 45 s after the GRB time (5 sec exposition). The second images was made (30 sec exposition) 87 sec after the GRB time. The unfiltered image is calibrateds 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 17.0 m. The JPG-image available at http://observ.pereplet.ru/images/GRB051011/1.jpg . The reduction is continuing. This work is supported by RFFI 04-02-16411 grant. This message can be cited. Mailto: lipunov@sai.msu.ru