Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
This paper presents the Planck 2015 likelihoods, statistical descriptions of the 2-point correlations of CMB data, using the hybrid approach employed previously: pixel-based at $\ell<30$ and a Gaussian approximation to the distribution of spectra at higher $\ell$. The main improvements are the use of more and better processed data and …