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Violent red flashes seen from black hole V404 Cygni

16 March 2016 Astronomy Now

In June 2015, V404 Cygni underwent dramatic brightening for about two weeks, as it devoured material that it had stripped off an orbiting companion star. Violent red flashes, lasting just fractions of a second, were observed during the flare-up — one of the brightest black hole outbursts in recent years.

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Monster black hole wakes up after 26 years

26 June 2015 Astronomy Now

On 15 June 2015, a long-time acquaintance of X-ray and gamma ray astronomers made its comeback to the cosmic stage: V404 Cygni, a system comprising a black hole and a star orbiting one another. It is located in our Milky Way galaxy, almost 8,000 light-years away in the constellation Cygnus, the Swan.