TITLE: GCN CIRCULAR NUMBER: 10582 SUBJECT: GRB 100413A: MASTER-Net optical observations DATE: 10/04/13 19:34:34 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok, O.Gres, O. Irkutsk State University K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok, O.Gres, O. Chuvalaev Irkutsk State University V.Yurkov, Yu.Sergienko, D.Varda, A.Garusina Blagoveschensk Educational State University, Blagoveschensk 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.Zemnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, T.Kopytova, A.Popov Ural State University, Kourovka Two MASTER robotic telescopes (MASTER-Net: http://observ.pereplet.ru, testing telescopes) located at Baykal-Tunka and Blagoveschensk was responted to the GRB 100413A (Swift Bat alert, Holland et al, GCN CIRC 10581) 32 sec after Notice time and 65 s after the GRB time. There is now OT on the first 20-s exposition time unfiltered images inside Swift XRT error box (Holland et al., GCN CIRC 10581) brighter 17.0 (Blagoveschensk) and 16.6 (Baykal-Tunka). The message may be cited. mailto: lipunov@sai.msu.ru