TITLE: GCN CIRCULAR NUMBER: 12853 SUBJECT: GRB 120118B: MASTER optical observations DATE: 12/01/18 19:39:46 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs O.Gres, O.Chuvalaev,K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev Irkutsk State University V. Lipunov, E. Gorbovskoy, 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 Moscow State University, Sternberg Astronomical Institute V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda, Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB120118A (Littlejohns et al., GCN Circ 12852) 1417 s after notice time and 1437 sec after GRB time at 2012-01-18 17:24:53 UT in two polarizations. On our first (120s exposure) set we haven`t found optical transient within SWIFT error-box . The delay is due to weather conditions. The 5-sigma upper limit has been about 17.0 mag This circular was generated automatically. The message may be cited.