V404 Cygni Wind (VIDEO) University of Southampton This video is under embargo. Please login to access this video. Caption view of the accretion disc surrounding the black hole V404 Cygni, where the intense wind detected by GTC becomes evident. Early in the video there is a bright X-ray flare, which flashes, following which you can see material streaming off the disc, which is the wind. Credit Gabriel Pérez, SMM (IAC). Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.