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- W2035529323 abstract "Detailed measurements of the CMB lensing signal are an important scientific goal of ongoing ground-based CMB polarization experiments, which are mapping the CMB at high resolution over small patches of the sky. In this work we simulate CMB polarization lensing reconstruction for the $EE$ and $EB$ quadratic estimators with current-generation noise levels and resolution, and show that without boundary effects the known and expected zeroth and first order ${N}^{(0)}$ and ${N}^{(1)}$ biases provide an adequate model for nonsignal contributions to the lensing power spectrum estimators. Small sky areas present a number of additional challenges for polarization lensing reconstruction, including leakage of $E$ modes into $B$ modes. We show how simple windowed estimators using filtered pure $B$ modes can greatly reduce the mask-induced mean-field lensing signal and reduce variance in the estimators. This provides a simple method (used with recent observations) that gives an alternative to more optimal but expensive inverse-variance filtering." @default.
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- W2035529323 date "2014-07-24" @default.
- W2035529323 modified "2023-10-16" @default.
- W2035529323 title "CMB lensing reconstruction using cut sky polarization maps and pure<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>B</mml:mi></mml:math>modes" @default.
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- W2035529323 doi "https://doi.org/10.1103/physrevd.90.023539" @default.
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