TITLE: GCN CIRCULAR NUMBER: 10853 SUBJECT: GRB 100614A: MASTER-Net optical alert observations DATE: 10/06/15 14:22:59 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok, O.Gres, O.Chuvalaev Irkutsk State University MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located near Kislovodsk was pointed to the GRB 100614A (Stratta et al., GCN 10837) 26 s after notice time and 7 min 59 s after GRB time in two polarizations at 2010-06-14 21:46:25 UT. We have a number images with 180-s exposition. We haven't found optical transient within Swift-XRT error-box. The 3-sigma unfiltred upper limit has been about 20.9 mag on 34 coadded images (21:46:25 - 22:42:05 UT). The message may be cited. mailto: lipunov@sai.msu.ru