0 Assigned ID: 596 ----- Attempting Submission 1 (Fri Apr 10 17:19:07 GMT 2015) ----- HST Phase I Proposal 596 (host.apt) successfully submitted. Receipt: # 596-1 ----- Attempting Submission 2 (Fri Apr 10 22:15:45 GMT 2015) ----- Supernovae (SNe) and their galaxies are intimately linked. The stars that explode are formed from the gas in the galaxy, and when they explode, they enrich and energize that gas. Unsurprisingly, SNe from massive stars tend to be found in star-forming galaxies, while SNe Ia, with their longer lived progenitors, are found in all galaxies. In addition to global properties, SN properties are strongly correlated with local galactic environments. For instance, stripped-envelope core-collapse SNe (those without massive hydrogen envelopes) tend to be found in the highest star-forming regions of their galaxies while other SNe are less particular. At low-z where local environments are resolved from the ground, these connections provide unique perspectives on progenitors and explosion mechanisms. But these studies are limited. To measure any redshift evolution and to study the rarest events, we must look at high-z SNe - and to measure their local environments, we need HST. The Pan-STARRS (PS1) Medium-Deep Survey has discovered at least 162 transients which have, in total, over 1311 archival HST images of their local galactic environment. The PS1/HST sample contains roughly 100 SNe Ia, 50 core-collapse SNe (including several super-luminous SNe), and 10 other transients such as luminous blue variables, tidal disruption events, and novae. This is the largest such dataset in existence. We propose to study the local environments of SNe by taking advantage of the pre-existing HST imaging of PS1 transients. We plan to use these data to investigate how local environments influence the rate, luminosity, and other physical characteristics of all varieties of SNe and other transients. HOT STARS 0 Regular false true false false false SUPPORTED