A multifrequency method based on the matched multifilter for the detection of point sources in CMB maps
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Lanz Oca, Luis Fernando; Herranz Muñoz, Diego; Sanz Estévez, José Luis; González-Nuevo, J.; López-Caniego Alcarria, MarcosFecha
2010Derechos
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society ©: 2010 The Authors. Journal compilation ©2010 RAS. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Publicado en
Monthly Notices of the Royal Astronomical Society, 2010, 403(4), 2120-2130
Editorial
Oxford University Press
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Palabras clave
Methods: data analysis
Techniques: image processing
Surveys
Cosmic microwave background
Radio continuum: galaxies.
Resumen/Abstract
In this work, we deal with the problem of simultaneous multifrequency detection of extragalactic point sources in maps of the cosmic microwave background. We developed a linear filtering technique that takes into account the spatial and the cross-power spectrum information at the same time. By using realistic simulations, we compared this technique with the monofrequency matched filter in terms of completeness, reliability, flux and spectral index accuracy. The multifrequency method outperforms the matched filter in all the studied cases in this work.
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