Preparing for Supernova Cosmology With the Nancy Grace Roman Space Telescope

The Nancy Grace Roman Space Telescope is a wide-field infrared telescope that will launch before mid-2027. With 100 times the field of view of the Hubble Space Telescope, the Roman Space Telescope is designed for cosmological surveys. I will present an overview of the Roman Space Telescope's capabilities and the three main legacy surveys. Including its vast archive and guest-observer capabilities, Roman is a telescope for the entire astrophysics community. One target experiment is a revolutionary Type Ia supernovae survey. From the High Latitude Time Domain survey, Roman will observe ~12,000 SNe Ia with most of them being above a redshift of one. This large data set is designed to be used to make the most precise measurement of the time dependence of Dark Energy. In addition, Roman should shed light on the solution to the current Hubble constant tension. To make this measurement, Roman will need to control both hardware and astrophysical systematics. In this talk, I will explain the current efforts to ensure Roman's calibration, as well as improved analysis models and methods. This work allows Roman to make this extremely precise measurement of Dark Energy, improve our understanding of SN Ia, and shed light on the Hubble constant tension.