Improving Weak Lensing Mass Map Reconstructions using Gaussian and Sparsity Priors: Application to DES SV

Understand

Mapping the underlying density field, including non-visible dark matter, using weak gravitational lensing measurements is now a standard tool in cosmology.

• Due to its importance to the science results of current and upcoming surveys, the quality of the convergence reconstruction methods should be well understood.
• We compare three methods: Kaiser-Squires (KS), Wiener filter, and GLIMPSE.
• KS is a direct inversion, not accounting for survey masks or noise.