Newslink: Gravitational-Wave Detector Catches Lightest Black Hole Smashup Yet
The Laser Interferometer Gravitational-Wave Observatory (LIGO) has detected yet another black hole merger — their fifth since 2015, and involving some of the lightest black holes the instrument has ever detected.
https://www.space.com/38816-gravitational-waves-fifth-ligo-black-hole-crash.html