16741

We propose a public UV survey of Type Ia supernova (SN Ia) host galaxies to provide environmental insights into their progenitor systems. Understanding the progenitors of SNe Ia is vital to reduce systematic uncertainties in their standardization to measure extargalactic distances and to constrain cosmological parameters. Despite surges in SN Ia discoveries comma direct progenitor constraints are elusive comma and so environment and host galaxy studies comma through analysis of the coeval stellar populations comma offer valuable alternate routes to perform large-scale population studies. UV coverage is uniquely afforded by HST and a key window into star formation and massive stellar populations. Crucially comma the targets have been selected by having pre-existing integral-field spectroscopic (IFS) observations. Galaxy studies have undergone a resurgence with the advent of new IFS instruments comma allowing spatially-resolved spectroscopic studies across entire galaxies comma but suffer from a lack of wavelength coverage. The UV data proposed is essential to derive meaningful properties of young stellar populations. This will provide the age resolution in stellar population fitting to comma for the first time comma directly measure the delay-time-distribution of SNe Ia and assess the turn-on timescale at which the youngest SN Ia progenitors explode. Such a data set will have legacy for a multitude of galaxy studies and we are committed to making our joint UV+IFS dataset and analysis public.