Published December 21, 2009
| Published
Journal Article
Open
Lensing reconstruction from Planck sky maps: inhomogeneous noise
- Creators
- Hanson, Duncan
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Rocha, Graça
- Gόrski, Krzysztof
Abstract
We discuss the effects of inhomogeneous sky coverage on cosmic microwave background 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 suboptimal at the 5 per cent level for Planck, and the second prevents biasing due to uncertainties in the noise model.
Additional Information
© 2009 The Authors. Journal compilation © 2009 RAS. Accepted 2009 August 26. Received 2009 August 20; in original form 2009 July 13. Published Online: 15 Oct 2009. Some of the results in this paper have been derived using the HEALPIX (Gorski et al. 2005) package. DH is grateful for the support of a Gates scholarship and to Anthony Challinor for useful discussion. We gratefully acknowledge support by the National Aeronautics and Space Administration (NASA) Science Mission Directorate via the US Planck Project. The research described in this paper was partially carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA.Attached Files
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Additional details
- Eprint ID
- 17205
- Resolver ID
- CaltechAUTHORS:20100119-090407961
- NASA Science Mission Directorate via the US Planck Project
- Created
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2010-01-25Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field