iPTF14hls Supernova.

[Notebook]

t's the celestial equivalent of a horror film adversary: a star that just wouldn't stay dead.
When most stars go supernova, they die in a single blast, but astronomers have found a star that survived not one, but five separate explosions.
The "zombie" star kept erupting for nearly two years - six times longer than the duration of a typical supernova.

http://www.bbc.co.uk/news/science-environment-41916738