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ABSTRACT: One of the main obstacles for extracting the Cosmic Microwave Background (CMB) signal from observations in the mm-submm range
is the foreground contamination by emission from Galactic components: mainly synchrotron, free-free and thermal dust emission.
Due to the statistical nature of the intrinsic CMB signal it is essential to minimize the systematic errors in the CMB temperature
determinations.
Following the available knowledge of the spectral behavior of the Galactic foregrounds simple power law-like spectra have
been assumed. The feasibility of using a simple neural network for extracting the CMB temperature signal from the combined
signal CMB and the foregrounds has been investigated. As a specific example, we have analysed simulated data, as expected
from the ESA Planck CMB mission. A simple multilayer perceptron neural network with 2 hidden layers can provide temperature
estimates over more than 80 per cent of the sky that are to a high degree uncorrelated with the foreground signals. A single
network will be able to cover the dynamic range of the Planck noise level over the entire sky.
Astrophysics and Space Science 04/2012; 318(3):195-206. · 1.69 Impact Factor
