18 Nov 2021 [updated 30 Nov 2021] — On Monday 22 November 2021, at 10:00AM Eastern US time, the LIGO-Virgo-Kagra Collaborations will host an online webinar entitled “Deep Extended Catalog of Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run.” The presenters will report on the gravitational-wave transient catalog release GWTC-2.1 and host a Q&A session afterward.