Theo Schutt: Modeling the point-spread function for DES Y6

The point-spread function (PSF) is a key ingredient for weak lensing analyses and a potential source of significant systematic bias in the cosmological results. In this talk, I will explain the key improvements made in the PSF characterization for the Dark Energy Survey Year 6 analysis, which result in negligible bias in the cosmological parameter inference. I will also discuss ongoing and future improvements to our PSF modeling software, PIFF, in light of Rubin Observatory’s upcoming Legacy Survey of Space and Time.
[Slides]