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.