2001/11/08 by Pavel Naselsky, P. Naselsky, D. Novikov +2 · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2002.05525.x
published as Mon.Not.Roy.Astron.Soc. 335 (2002) 550
arxiv created 2001/11/08 · openalex publication_date 2002/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A method is proposed for combining multifrequency maps in order to produce a catalogue of extragalactic point sources using data from future high-precision satellite experiments. We have found the optimal way of combining maps at different frequencies in order to maximize the signal (point sources) to noise (rest of the signal) ratio. Our approach is a natural multifrequency generalization of the bandpass filter introduced by Tegmark & de Oliveira-Costa. We show that combination of different frequency maps gives us the possibility of creating a more complete catalogue of point sources.