Weak Lensing Mass Reconstruction using Wavelets

Details Weak Lensing Mass Reconstruction using Wavelets Weak Lensing Mass Reconstruction using Wavelets

2005-03-16

arxiv.org/abs/astro-ph/0503373v2

Astronomy and Astrophysics

Astrophysics

Accepted manuscript with all figures can be downloaded at: http://jstarck.free.fr/aa_wlens05.pdf and software can be downloade

Scientific paper

10.1051/0004-6361:20052997

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 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 Lambda-CDM simulations with added noise corresponding to both ground-based and space-based observations.

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