TITLE: GCN CIRCULAR NUMBER: 16858 SUBJECT: GRB 140930B: MASTER early optical observations DATE: 14/09/30 20:01:31 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya, V.Kornilov, D.Kuvshinov, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov, A. Gabovich Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB140930B 21 sec after notice time and 39 sec after trigger time at 2014-09-30 19:42:21 UT in two polarizations. On our first (10s exposure) set we haven`t found optical transient within SWIFT error-box (ra=00 25 25 dec=+24 16 28 r=0.050000). The 5-sigma upper limit has been about 16.0 mag MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB140930B 36 sec after notice time and 54 sec after trigger time at 2014-09-30 19:42:36 UT in two polarizations. On our first (10s exposure) set we haven`t found optical transient within SWIFT error-box (ra=00 25 25 dec=+24 16 27 r=0.050000). The 5-sigma upper limit has been about 15.5 mag The observations on both observatories is continued.