https://www.cnet.com/news/nasa-telescope-spots-black-hole-shrinking-after-devouring-a-star/

"NICER has allowed us to measure light echoes closer to a stellar-mass black hole than ever before," said first author Erin Kara. 

The research, published on Jan. 10 in Nature, provides some tantalizing new evidence about the way a black hole evolves once it gobbles up a star. The major takeaway for the team was the the black hole's corona was shrinking.