Dr. Kate Alexander works in time-domain astronomy and multi-messenger astrophysics. She uses a variety of telescopes to study the physics powering the most extreme astrophysical transients, from gamma-ray bursts to the tidal disruptions of stars by supermassive black holes. She also searches for radio counterparts to gravitational wave signals from compact objects mergers. Radio observations of these events probe mass ejection, including the formation of relativistic jets, and provide important astrophysical context.