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Lensing reconstruction from PLANCK sky maps: inhomogeneous noise · Around

2009

Lensing reconstruction from PLANCK sky maps: inhomogeneous noise

Hanson, Duncan, Rocha, Graca, Gorski, Krzysztof

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We discuss the effects of inhomogeneous sky-coverage on CMB lens reconstruction, focusing on application to the recently launched Planck satellite.

We discuss the mean-field which is induced by noise inhomogeneities, as well as three approaches to lens reconstruction in this context: an optimal maximum-likelihood approach which is computationally expensive to evaluate, and two suboptimal approaches which are less intensive.
The first of these is only sub-optimal at the five per-cent level for Planck, and the second prevents biasing due to uncertainties in the noise model.

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Then

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Hanson D., Challinor A., Efstathiou G., Bielewicz P., 2009, In prep
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Ashdown M. A. J., et al., 2007b, A&A, 471, 361, astro-ph/0702483

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