This paper presents a new method for the reconstruction of weak lensing mass maps. It uses the
multiscale entropy concept, which is based on wavelets, and the False Discovery Rate (FDR)
which allows us to derive robust detection levels in wavelet space. We show that this new
restoration approach outperforms several standard techniques currently used for weak shear
mass reconstruction. This method can also be used to separate E and B modes in the shear
field, and thus test for the presence of residual systematic effects. We concentrate on large
blind cosmic shear surveys, and illustrate our results using simulated shear maps derived from
N-Body CDM simulations (Vale and White, 2003) with added noise corresponding to both
ground-based and space-based observations. |
