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Paper detail

Lensing reconstruction from PLANCK sky maps: inhomogeneous noise

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.

preprint2010arXivOpen access
Duncan HansonGraca RochaKrzysztof Gorski
astro-ph.CO
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Duncan HansonGraca RochaKrzysztof Gorski

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