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Proceedings Paper

Detection of compact sources with multifilters
Author(s): D. Herranz; Jose Luis Sanz; R. B. Barreiro; M. Hobson; Enrique Martinez-Gonzalez; J. M. Diego
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Paper Abstract

We present scale-adaptive filters that optimize the detection/separation of compact sources on a background. We assume that the sources have a multiquadric profile and a background modeled by an homogeneous and isotropic random field characterized by a power spectrum. We make an n-dimensional treatment but consider two interesting physical applications related to clusters of galaxies (Sunyaev-Zel'dovich effect and X-ray emission). We extend this methodology to multifrequency maps, introducing multifilters that optimize the detection on clusters on microwave maps. We apply these multifilters to small patches (corresponding to 10 frequency channels) of the sky such as the ones that will produce the future ESA Planck mission. Our method predicts a number of ≈10000 clusters in 2/3 of the sky, being the catalog complete over fluxes S > 170mJy at 300GHz.

Paper Details

Date Published: 19 December 2002
PDF: 12 pages
Proc. SPIE 4847, Astronomical Data Analysis II, (19 December 2002); doi: 10.1117/12.460427
Show Author Affiliations
D. Herranz, Univ. de Cantabria (Spain)
Jose Luis Sanz, Univ. de Cantabria (Spain)
R. B. Barreiro, Univ. de Cantabria (Spain)
M. Hobson, Univ. of Cambridge (United Kingdom)
Enrique Martinez-Gonzalez, Univ. de Cantabria (Spain)
J. M. Diego, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 4847:
Astronomical Data Analysis II
Jean-Luc Starck; Fionn D. Murtagh, Editor(s)

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