https://blog.gravityspy.org/2017/10/17/multi-messenger-observations-of-a-binary-neutron-star-merger/
Hey Gravity Spy Team! On August 17, 2017, ripples traveling along the fabric of spacetime passed through a small planet after more than a 100 million year...
neutron star mergermultimessengerobservationsbinary
https://arstechnica.com/science/2022/03/astronomers-spot-possible-x-ray-afterglow-3-5-years-after-neutron-star-merger/
Mar 4, 2022 - This would mean the two stars "spun down" for a second before collapsing into black hole.
mysteriousxrayscouldkilonova