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
https://www.bgr.com/science/astronomers-discovered-a-rare-star-system-ready-to-explode-in-a-massive-kilonova/
Astronomers have discovered an exceptionally rare system set to end in a kilonova explosion so rare we've never found one before.
ready to explodestar systemastronomersdiscoveredrare