Beam deconvolution in noisy CMB maps

Beam deconvolution in noisy CMB maps

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Beam deconvolution in noisy CMB maps

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Burigana, C.; Sáez Milán, Diego Pascual
This document is a artículo publicadoDate2003

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The subject of this paper is beam deconvolution in small angular scale CMB experiments. The beam effect is reversed using the Jacobi iterative method, which was designed to solved systems of algebraic linear equations. The beam is a non circular one which moves according to the observational strategy. A certain realistic level of Gaussian instrumental noise is assumed. The method applies to small scale CMB experiments in general (cases A and B), but we have put particular attention on PLANK mission at 100 GHz (cases C and D). In cases B and D, where noise is present, deconvolution allows to correct the main beam distortion effect and recover the initial angular power spectrum up to the end of the fifth acoustic peak. An encouraging result whose importance is analyzed in detail. More work about deconvolution in the presence of other systematics is in progress.

    BURIGANA, C. ; Saez Milan, Diego Pascual, 2003, Beam deconvolution in noisy CMB maps, Astronomy and Astrophysics, vol. 409, no. 2, p. 423-437

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