Determining the Intrinsic UV Colors of Type Ia Supernovae with SED Modeling

Type Ia supernovae are some of the most luminous transient events in our universe, but their intrinsic ultraviolet (UV) properties remain difficult to measure accurately due to effects such as dust extinction and cosmological shifts. We estimate the required dust corrections and k-corrections for a sample of 40 supernovae by creating multi-color models of the supernova’s spectral energy density with a library of artificial template spectra. We then examine correlations between the corrected colors and light curve properties, revealing the potential for UV/optical cosmology studies of high-z targets such as those that will be observed by the Rubin Observatory.