CMB lensing reconstruction with point source masks

Details CMB lensing reconstruction with point source masks CMB lensing reconstruction with point source masks

2011-03-11

arxiv.org/abs/1103.2305v1

Phys.Rev.D84:063001,2011

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

18 pages, 9 figures

Scientific paper

10.1103/PhysRevD.84.063001

An incomplete sky coverage poses difficulties in the extraction of the weak lensing information from the CMB. We test the reconstruction of the weak lensing convergence from CMB maps to which masks of point sources have been applied. We use the quadratic estimator with a kernel with finite support acting in real space for a Planck simulation. We recover the lensing signal without significant loss of power or addition of spurious correlations, thus showing that masking defected pixels does not affect the reconstruction of the weak lensing convergence in real space.

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