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A hybrid approach to cosmic microwave background lensing reconstruction from all-sky intensity maps
2012
Astronomy and Astrophysics
Based on realistic simulations, we propose an hybrid method to reconstruct the lensing potential power spectrum, directly on PLANCK-like CMB frequency maps. It implies using a large galactic mask and dealing with a strong inhomogeneous noise. For l < 100, we show that a full-sky inpainting method, already described in a previous work, still allows a minimal variance reconstruction, with a bias that must be accounted for by a Monte-Carlo method, but that does not couple to the deflection field.
doi:10.1051/0004-6361/201218899
fatcat:5pwydv7t6faltkw66iopcy26hu