The LIGO-Virgo-KAGRA Collaboration (LVK) is the combined effort
of the operators of gravitational-wave detectorsLIGO, Virgo,
and KAGRA to coordinate their efforts, including
synchronizing their Observing Runs,
promptly combining their analysis (such as localization)
and their announcements of GW detections,
and producing combined catalogs of
their detections.