A multifrequency method based on the Matched Multifilter for the detection of point sources in CMB maps
arXiv:0907.0603 · doi:10.1111/j.1365-2966.2010.16260.x
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 apply a linear filtering technique that uses spatial information and the cross-power spectrum. To make this, we simulate realistic and non-realistic flat patches of the sky at two frequencies of Planck: 44 and 100 GHz. We filter to detect and estimate the point sources and compare this technique with the monofrequency matched filter in terms of completeness, reliability, flux and spectral index accuracy. The multifrequency method outperforms the matched filter at the two frequencies and in all the studied cases in the work.
14 pages, 6 figures, 1 table
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Cited by in corpus (10)
- Powellsnakes II: a fast Bayesian approach to discrete object detection in multi-frequency astronomical data sets
- Planck intermediate results. LIV. The Planck Multi-frequency Catalogue of Non-thermal Sources
- A Bayesian technique for the detection of point sources in CMB maps
- Introducing constrained matched filters for improved separation of point sources from galaxy clusters
- MADX -- A simple technique for source detection and measurement using multi-band imaging from the Herschel-ATLAS survey
- Detection of new point-sources in WMAP Cosmic Microwave Background (CMB) maps at high Galactic latitude. A new technique to extract point sources from CMB maps
- Compact source detection in multi-channel microwave surveys: from SZ clusters to polarized sources
- Multifrequency filter search for high redshift sources and lensing systems in Herschel-ATLAS
- An approach for the detection of point-sources in very high resolution microwave maps
- Detection likelihood of cluster-induced CMB polarization