Supernova Surveys in the Precision Cosmology Era
David Rubin
Space Telescope Science Institute

Although we are firmly in the era of precision cosmology, both statistical and systematic uncertainties limit our physical understanding of dark energy, to which we attribute the acceleration of the expansion rate of the universe. Investigating dark energy's properties, by measuring distances and structure formation, relies on surveys of Type Ia Supernovae and other cosmological probes. Better SN Ia survey designs can reduce cosmological uncertainties through a combination of precise spectrophotometric calibration, improvements in data analysis, and extended wavelength observations. I will discuss my current and future work on precision spectrophotometric calibration using the UH 2.2 meter telescope, present the current status of a combined Subaru-Hubble infrared SN Ia survey, and briefly describe an improved Bayesian cosmological framework that optimally treats statistical and systematic uncertainties. I will also report on work optimizing and simulating a combination of ground-based optical telescopes and the planned WFIRST observatory. With these surveys and analysis improvements, we will reduce the uncertainties on the dark energy equation of state as a function of time by factors of 5 to 10, dramatically reducing the parameter space of dark energy models.