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arXiv 0907.1927astro-ph.CO
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从PLANCK天空图进行透镜重建:非均匀噪声

Lensing reconstruction from PLANCK sky maps: inhomogeneous noise

Duncan Hanson, Graca Rocha, Krzysztof Gorski

摘要:

我们讨论了不均匀的天空覆盖对CMB透镜重建的影响,重点是应用于最近发射的普朗克卫星。我们讨论的平均场,这是由噪声不均匀性,以及三种方法来透镜重建在这种情况下:一个最佳的最大似然方法,这是计算昂贵的评估,和两个次优的方法,这是不太密集。其中第一个仅在普朗克的百分之五水平下是次优的,第二个防止由于噪声模型中的不确定性而导致的偏差。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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