A Survey of Late-Time X-ray Emission in VLASS Detected Supernovae

Radio and Xray observations of supernovae (SNe) acquired in the poorly sampledphase of years to decades postexplosion are necessary to drive progress inseveral fundamental areas of explosive transient research. Bright emissionvirgulyears to decades post explosion of extragalactic SNe may be due to A)shockinteraction with the circumstellar medium; or B) the emergence ofradiation from a pulsar wind nebula. A solid identification of the scenariosabove would lead to significant advances in our understanding of the physics ofstellar explosions, their progenitors, and their remnants. We propose the firstsystematic latetime Xray survey of SNe with bright detected radio emission. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]