Some Good Reasons to Use Matched Filters for the Detection of Point Sources in CMB Maps

Abstract

In this draft we comment on the results concerning the performances of matched filters, scale adaptive filters and Mexican hat wavelet that recently appeared in literature in the context of point source detection in Cosmic Microwave Background maps. In particular, we show that, contrary to what has been claimed, the use of the matched filters still appear to be the most reliable and efficient method to disantangle point sources from the backgrounds, even when using detection criterion that, differently from the classic $n\sigma$ thresholding rule, takes into account not only the height of the peaks in the signal corresponding to the candidate sources but also their curvature.

arXiv commentReplacement after submission to A&A and referee's comments. Astronomy and Astrophysics, in press, JNL/2003/4737

References in corpus (4)

• Isotropic Wavelets: a Powerful Tool to Extract Point Sources from CMB Maps
• Optimal detection of sources on a homogeneous and isotropic background
• Comparing filters for the detection of point sources
• On Optimal Detection of Point Sources in CMB Maps

Cited by in corpus (9)

• A joint analysis of BLAST 250--500um and LABOCA 870um observations in the Extended Chandra Deep Field South
• Comparison of filters for the detection of point sources in Planck simulations
• Optimal filters on the sphere
• Filter design for the detection of compact sources based on the Neyman-Pearson detector
• On the Correct Estimate of the Probability of False Detection of the Matched Filter in Weak-Signal Detection Problems
• The correct estimate of the probability of false detection of the matched filter in the detection of weak signals. II. (Further results with application to a set of ALMA and ATCA data)
• Correct estimate of the probability of false detection of the matched filter in weak-signal detection problems. III (Peak distribution method versus the Gumbel distribution method)
• 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
• An Efficient and Optimal Filter for Identifying Point Sources in Millimeter/Sub-Millimeter Wavelength Sky Maps