TITLE: GCN CIRCULAR NUMBER: 12756 SUBJECT: GRB 111228A: MASTER OT observations DATE: 11/12/29 07:29:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda, Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich, S. Shurpakov Sternberg Astronomical Institute, Moscow State University K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev,E.Konstantinov, Irkutsk State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka MASTER II robotic double telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB111228.66 191 sec after notice time and 244 sec after GRB time at 2011-12-28 15:48:47.127 UT. The some delay was due to weather conditions. On our first (20s exposure, two polarizations, unfiltered) set we found optical transient at Swift OT position (Ukwatta et al., GCN Circ R12737). The OT magnitude is about 16.5 mag in both polarizations. The reduction is continuated. The message may be cited.