TITLE: GCN CIRCULAR NUMBER: 10213 SUBJECT: GRB 091130: MASTER observations DATE: 09/11/30 17:50:28 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs S.Sergienko, V.Yurkov Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, D. Zimnukhov, V. Lipunov, V.Kornilov, A.Belinski, D.Kuvshinov, N.Shatskiy, N.Tyurina, P.Balanutsa, V.V.Chazov, A.Kuznetsov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parkhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalognikh, T.Kopytova, A. Popov Ural State University, Kourovka S.Yazev, K.Ivanov, N.M.Budnev, E.Konstantinov, V.Lenok Irkutsk State University MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru, D= 200 mm, FOV= 7 square degrees, 16 Mpx Apogee CCD, testing mode) located at Blagoveschensk was responted to the GRB 091130 (Krimm et al., GCN 10212) 23 sec after Notice time and 7 min 22 s after the GRB time. The first images are saturated due to the Moon light and cloudes. After exposition correction we took several dozens succesfull images with limit ~14.5 mag. Time T_start-T_GRB ExpTime m_lim 16:43:56 35:45 60s 14.5 16:43:56 35:45-47:03 10x60s 16 We do not see OT brighter 14 mag in BAT error box. The reduction is continued. The message may be cited. The summ of the images is available at http://observ.pereplet.ru/images/GRB091130/grb091130.jpeg. We note that MASTER-Amur-Blagoveschensk are in testing mode now. mailto: lipunov@sai.msu.ru