Université de GenèveDépartement de Physique ThéoriqueCAP Genève

The Kolmogorov-Smirnov test for the CMB

3. January 2012
Cite as: 
M. Frommert, R. Durrer, J. Michaud, JCAP 1201 (2012) 009 [arXiv:1108.5354].
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We investigate the statistics of the cosmic microwave background using the Kolmogorov-Smirnov test. We show that, when we correctly de-correlate the data, the partition function of the Kolmogorov stochasticity parameter is compatible with the Kolmogorov distribution and, contrary to previous claims, the CMB data are compatible with Gaussian fluctuations with the correlation function given by standard ΛCDM. We then use the Kolmogorov-Smirnov test to derive upper bounds on residual point source power in the CMB, and indicate the promise of this statistics for further datasets, especially Planck, to search for deviations from Gaussianity and for detecting point sources and Galactic foregrounds.


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