LIGO and Virgo catch their biggest fish so far https://www.mpg.de/15315800/0901-grav-057313-ligo-und-virgo-fangen-ihren-bislang-dicksten-fisch?c=11970651
GW190521 is a new gravitational wave signal. It is the result of the merger of the most massive and most distant black holes to date. The remnant of GW190521 is a black hole with 142 solar masses. For the first time the formation of an intermediate-mass black hole was directly observed.
More information is available on the Virgo website at http://www.virgo-gw.eu.