About 3 billion years ago, a hapless star got caught in a twisted tug-of-war between two gigantic black holes — and now, we are seeing the faint screams of X-rays emanating from this violent event. If confirmed, it could be the most distant episode of two black holes attacking a star ever seen.
An international team of astronomers reported their decades-long observation of the faintest known variable X-ray flare in a paper accepted for publication in the journal The Innovation in November.
