TITLE: GCN CIRCULAR NUMBER: 19683 SUBJECT: GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd) DATE: 16/07/12 19:03:59 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov, Lomonosov Moscow State University, Sternberg Astronomical Institute R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory O.Gres, K.Ivanov, S.Yazev, N.M.Budnev, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, A.Gabovich, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk Ricardo Podesta, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) MASTER-Crimea robotic telescope (testing camera 20 cm) pointing to LAT error box (Dirirsa et al., GCN 19580) 12 sec after LAT notice time and 66 sec after trigger time at 2016-06-25 22:44:30 UT in unfiltered mode. The OT was about 9.55 +-0.01 mag at this moment ( 0.2B + 0.8R with respect to USNOB1.0 stars) The automatic photometry and astrometry are: +id- time coord2000 mag 179841451 22:44:30.055 20h 34m 23.49s , +06d 55m 07s.6 9.55 179890027 22:44:30.055 20h 34m 23.52s , +06d 55m 07s.9 10.11 179845079 22:45:00.899 20h 34m 23.50s , +06d 55m 07s.8 10.03 179878574 22:45:37.806 20h 34m 23.52s , +06d 55m 08s.0 10.54 179909653 22:46:25.105 20h 34m 23.53s , +06d 55m 07s.8 11.46 179883969 22:46:25.105 20h 34m 23.52s , +06d 55m 07s.8 11.04 179895778 22:47:20.57 20h 34m 23.52s , +06d 55m 07s.9 11.52 179901960 22:48:26.68 20h 34m 23.52s , +06d 55m 08s.0 11.91 The delay with internet problems last time . The message may be cited.