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Reconstruction of the cosmic microwave background lensing for Planck
Perotto L., Bobin J., Plaszczynski S., Starck J.-L., Lavabre A.
Astronomy and Astrophysics 519 (2010) A4 - http://hal.in2p3.fr/in2p3-00373722
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique
Reconstruction of the cosmic microwave background lensing for Planck
L. Perotto1, 2, J. Bobin3, 4, S. Plaszczynski2, J.-L. Starck3, A. Lavabre2
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
CNRS : UMR5821 – IN2P3 – Université Joseph Fourier - Grenoble I – Institut Polytechnique de Grenoble - Grenoble Institute of Technology
53 avenue des Martyrs - 38026 Grenoble Cedex
2 :  LAL - Laboratoire de l'Accélérateur Linéaire
CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud
Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex
3 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
4 :  ACM - Department of Applied & Computational Mathematics
California Institute of Technology
CALTECH 1200 East California Boulevard Pasadena CA 91125
We prepare real-life Cosmic Microwave Background (CMB) lensing extraction with the forthcoming Planck satellite data, by studying two systematic effects related to the foregrounds contamination: the impact of foreground residuals after a component separation on the lensed CMB map, and of removing a large contaminated region of the sky. We first use the Generalized Morphological Component Analysis (GMCA) method to perform a component separation within a simplified framework which allows a high statistics Monte-Carlo study. For the second systematic, we apply a realistic mask on the temperature maps and then, restore them using a recent inpainting technique on the sphere. We investigate the reconstruction of the CMB lensing from the resultant maps using a quadratic estimator in the flat sky limit and on the full sphere. We find that the foreground residuals from the GMCA method does not alter significantly the lensed signal, nor does the mask corrected with the inpainting method.

Articles dans des revues avec comité de lecture
Astronomy and Astrophysics (Astron. Astrophys.)
Publisher EDP Sciences
ISSN 0004-6361 (eISSN : 1432-0756)

LAL 09-38, LPSC0949
12 pages, 6 figures, an error in a ref. corrected - Subm. to Astronomy & Astrophysics
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