TITLE: GCN CIRCULAR NUMBER: 12917 SUBJECT: GRB 120202A: MASTER early optical observations DATE: 12/02/06 16:13:53 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory 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 Moscow State University, Sternberg Astronomical Institute O.Gres, O.Chuvalaev,K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev Irkutsk State University V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda, Blagoveschensk Educational State University, Blagoveschensk MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the INTEGRAL GRB120202A (Mereghetti et al., GCN Circ No 12909) 73 sec s after notice time and 81 sec after GRB time at 2012-02-02 21:41:38.354 UT. On our first (20s exposure) set we haven`t found optical transient within INTEGRAL error-box. Some delay was due to non format socket alert. The 5-sigma upper limit has been about 18.0 mag The message may be cited.