EXTRACTION OF POINT SOURCES FROM CMB MAPS USING WAVELETS
J. L. Sanz (1), P. Vielva (1,2), L. Cay{\'o}n (1),
E. Mart{\'\i}nez-Gonz{\'a}lez (1), J. Silk (3,4)
(1) Instituto de F{\'\i}sica de Cantabria, Fac. Ciencias, Avda. de Los
Castros s/n, 39005 Santander, Spain
(2) Departamento de F{\'\i}sica Moderna, Universidad de Cantabria, 39005
Santander, Spain
(3) Astronomy Department, University of Oxford, UK
(4) Center for Particle Astrophysics and Astronomy Department,
University of California, Berkeley, USA
Abstract:
It is shown the power of the wavelet analysis in the
detection of point sources in CMB maps, as well as in the
estimation of the intensity of such sources.
This method produce similar results that the ones
proposed by Tegmark \& Oliveira-Costa 1999, but with the
advantage that in our method nothing is assumed about the underlying
signal. We are able to give an estimation of the number of
point sources that this method could detect in the different
Planck channels, as well as the mean error in the estimation
of the flux. Another important consequence of this study is the
complementarity of our method with others based on Maximun Entropy
Methods.