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Detection of non-Gaussianity in the WMAP 1-year data using spherical wavelets
P. Vielva, E. Martinez-Gonzalez, R. B. Barreiro +2
A non-Gaussian detection in the WMAP 1-year data is reported. The detection has been found in the combined Q-V-W map proposed by the WMAP team (Komatsu et al. 2003) after applying…
CMB power spectrum estimation and map reconstruction with the Expectation - Maximization algorithm
E. Martinez-Gonzalez, J. M. Diego, P. Vielva +1
We apply the iterative Expectation-Maximization algorithm (EM) to estimate the power spectrum of the CMB from multifrequency microwave maps. In addition, we are also able to provid…
Foreground separation using a flexible maximum-entropy algorithm: an application to COBE data
R. B. Barreiro, M. P. Hobson, A. J. Banday +4
A flexible maximum-entropy component separation algorithm is presented that accommodates anisotropic noise, incomplete sky-coverage and uncertainties in the spectral parameters of…