TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3869 SUBJECT: GRB050824: MASTER observation OT DATE: 05/08/25 02:29:00 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs Corrected subject to GCN3868. V. Lipunov, V.Kornilov, N.Tyurina, A.Belinski, E.Gorbovskoy, D.Kuvshinov, A.Krylov, G.Borisov, V.Vladimirov, Krushinski V. Sternberg Astronomical Institute, Moscow Union "Optic" MASTER (http://observ.pereplet.ru) responded to GRB 050824 (Swift trigger 151905). The first image was 764 sec after SWIFT GRB050824 detection under the not very good weather condition (Moon light). We see OT J. Gorosabel (GCN 3865) with m = 17.5 (unfiltered close to R, exp. 45 sec) on 2-3 sigma level. On summ of 9 images from 19.5 up to 28.5 minut after GRB Time (23 12 16.00 UT) m= 18.0 on 5 sigma. UT After GRB time m 23 25 00 764s 17.9 23 31 44 19.5min - 28.5 min 18.3 23 31 44 19.5min - 37.75 min 18.8 The JPG-image of the summ will be available at http://observ.pereplet.ru/images/GRB050824/1.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