TITLE: GCN CIRCULAR NUMBER: 6138 SUBJECT: GRB 070224: MASTER observations DATE: 07/02/24 21:03:48 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy, A.Krylov,N.Shatskiy ,G.Borisov, A.Sankovich, G.Antipov, V.Vladimirov P.Gritsyk Sternberg Astronomical Institute, Moscow Union 'Optic' MASTER robotic system (http://observ.pereplet.ru) responded to GRB070224.9 (GRB_TIME is 2007-02-24 20:27:58.21). The first image was at 2007-02-24 20:30:04 UT, 51s after notice arrivel time and 00:02:05.79 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 brighter then 16.2 (s/n=10). The JPG-image will be available at http://observ.pereplet.ru/images/GRB070224.9/img/i12.jpg The reduction is continuing. This message can be cited. Mailto: lipunov@sai.msu.ru