Correlated Supernova Systematics and Ground Based Surveys

Understand

Supernova distances provide a direct probe of cosmic acceleration, constraining dark energy.

• This leverage increases with survey redshift depth at a rate bounded by the systematic uncertainties.
• We investigate the impact of a wavelength-dependent, global correlation model of systematics in comparison to the standard local-redshift correlation model.
• This can arise from subclass uncertainties as features in the supernova spectrum redshift out of the observer photometric filters or spectral range.