TITLE: GCN CIRCULAR NUMBER: 18783 SUBJECT: MASTER-NET observations of V404Cyg Swift Trigger 668877 DATE: 15/12/31 10:33:12 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Yurkov, Yu.Sergienko, A.Gabovich, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk E. Gorbovskoy, V. Lipunov, N.Tyurina, D. Vlasenko, V.Kornilov, P.Balanutsa,A.Kuznetsov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institute O. Gress, K. Ivanov, N.M. Budnev, V.A. Poleshchuk, S.A. Yazev Irkutsk State University Following Swift triggers 668877 and 668879 (Barthelmy et al. GCN 18777,18778) MASTER-Amur point to V404 Cyg directly after sunset ~10.3 h after the trigger time at 2015-12-31 08:49:10. We found V404 at a high state with unfiltered magnitude ~ 15.0 m. During the first hour of observing the object brightened up to 14.4. Dear colleagues MASTER team wishes you a Merry Christmas and a happy new year. The message may be cited.