Shear Power Spectrum Reconstruction using Pseudo-Spectrum Method

Details Shear Power Spectrum Reconstruction using Pseudo-Spectrum Method Shear Power Spectrum Reconstruction using Pseudo-Spectrum Method

2010-04-20

arxiv.org/abs/1004.3542v2

Mon. Not. Roy. Astron. Soc.412:65-74, 2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

11 pages, 4 figures, accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2010.17886.x

We develop a pseudo power spectrum technique for measuring the lensing power spectrum from weak lensing surveys in both the full sky and flat sky limits. The power spectrum approaches have a number of advantages over the traditional correlation function approach. We test the pseudo spectrum method by using numerical simulations with square-shape boundary that include masked regions with complex configuration due to bright stars and saturated spikes. Even when 25% of total area of the survey is masked, the method recovers the E-mode power spectrum at a sub-percent precision over a wide range of multipoles 100

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