TITLE: GCN CIRCULAR NUMBER: 14929 SUBJECT: GRB 130625A: MASTER afterglow limit DATE: 13/06/26 06:31:35 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov, A.Gabovich Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, D.Denisenko, V.Kornilov, D.Kuvshinov, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov Sternberg Astronomical Institute, Lomonosov Moscow State University K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University, Irkutsk A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik Kislovodsk Solar Station of the Pulkovo Observatory 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 GRB130625A 23177 sec s after notice time and 23214 sec after GRB time at 2013-06-25 13:27:34.231 UT. On our first (180s exposure) set we haven`t found optical transient within Swift error-box (D. Grupe et al. GCN 14923). The 5-sigma upper limit has been about 17.5 mag On coadd images images we received the following limits T_start T_finish T_mid t_mid-t_grb Exptime Filter Limit Coadd --------------------------------------------------------------------------- 13:27:34 14:17:44 13:52:39 24719 s 2700 s R 19.0 15 13:31:38 14:17:44 13:54:41 24841 s 2520 s W 19.5 14 The message may be cited.