TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3769 SUBJECT: GRB050805b: MASTER optical observations DATE: 05/08/05 21:53:46 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, V.Vladimirov, Krushinski V. Sternberg Astronomical Institute, Moscow Union "Optic" MASTER (http://observ.pereplet.ru) responded to GRB 050805b (Swift trigger 149131). The first image was 25 sec after Notice Time and 74 sec after SWIFT detection under the good weather condition. Optical limit is about 17.1 (30 sec exposition, unfiltred close to R). Ther is no new object in error box (GRB on Milky Way). The JPG-images are available at http://observ.pereplet.ru/images/GRB050805b/1.jpg . This work is supported by RFFI 04-02-16411 grant. This message can be cited. Mailto: lipunov@sai.msu.ru