Volume 391, Number 2, August IV 2002
|Page(s)||789 - 794|
|Section||Numerical methods and codes|
|Published online||02 August 2002|
On optimal detection of point sources in CMB maps
Chip Computers Consulting s.r.l., Viale Don L. Sturzo 82, S.Liberale di Marcon, 30020 Venice, Italy
2 ESA-VILSPA, Apartado 50727, 28080 Madrid, Spain e-mail: firstname.lastname@example.org
3 Department of Mathematical and Computer Sciences, Colorado School of Mines, Golden CO 80401, USA e-mail: ltenorio@Mines.EDU
Corresponding author: R. Vio, email@example.com
Accepted: 31 May 2002
Point-source contamination in high-precision Cosmic Microwave Background (CMB) maps severely affects the precision of cosmological parameter estimates. Among the methods that have been proposed for source detection, the family of pseudo-filters optimizes a measure of signal-to-noise and amplitude-scale relation. In this paper we show that these filters are in fact only restrictive cases of a more general class of matched filters that optimize signal-to-noise ratio and that have, in general, better source detection capabilities, especially for lower amplitude sources. These conclusions are confirmed by some numerical experiments.
Key words: methods: data analysis / methods: statistical
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.