Journal Article

A multifrequency method based on the matched multifilter for the detection of point sources in CMB maps

L. F. Lanz, D. Herranz, J. L. Sanz, J. González-Nuevo and M. López-Caniego

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 403, issue 4, pages 2120-2130
Published in print April 2010 | ISSN: 0035-8711
Published online April 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.16260.x
A multifrequency method based on the matched multifilter for the detection of point sources in CMB maps

Show Summary Details

Preview

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.

Keywords: methods: data analysis; techniques: image processing; surveys; cosmic microwave background; radio continuum: galaxies

Journal Article.  8877 words.  Illustrated.

Subjects: Astronomy and Astrophysics

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.