TITLE: GCN CIRCULAR NUMBER: 11960 SUBJECT: GRB 110422A: MASTER earlier OT polarization observations DATE: 11/04/22 21:09:53 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs O. Gres, K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Chuvalaev Irkutsk State University E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka (Baykal lake) was pointed to the GRB 110422A 34 sec after notice time and 53 sec after GRB time at 2011-04-22 15:42:48.507 UT. On our first (10s exposure) double set we found optical transient within SWIFT error-box (Palmer et al.11959). The position coincided with Elunko et al. GCN 11958. The polarizated magnitude in R band is ~16.5+-0.4 . We see OT on all next images in both polarizations. Is seems some brightenning during first minutes. The reduction is continuated. The message may be cited.