%0 Journal Article %D 2015 %T Optical follow-up of V404 Cyg during the current enhanced activity. %A Gazeas, K. %A Vasilopoulos, G. %A Petropoulou, M. %A Sapountzis, K. %K Binary %K Black Hole %K Request for Observations %K Transient %K Variables %X V404 Cyg is a known black hole Low mass X-ray binary with a late G-type companion, having a ~6.5 d orbital period. On June 15 18:32 UT Swift Burst Alert Telescope (BAT) was triggered due to the high X-ray activity of the system (Barthelmy et al. %V 7650 %P 1 %8 2015/06/1 %G eng %U https://ui.adsabs.harvard.edu/abs/2015ATel.7650....1G %! The Astronomer's Telegram