POKER (P. Of K EstimatoR) is an algorithm designed to estimate the angular power spectrum of a 2D map, or the cross-power spectrum of two such maps, in the flat sky approximation and in a realistic data context: steep signal power spectrum, non periodic boundary conditions, arbitrary pixel resolution, non trivial masks and observation patch geometry. It is an adaptation of the pseudo-angular power spectrum approach pioneered by MASTER (Hivon et al, 2002) in the context of CMB anisotropy.

POKER is fully described in Ponthieu, Grain & Lagache, (2011). It was used in particular to derive the power spectrum of the Cosmic Infrared Background anistropies from the Planck data in Planck Collaboration, early results XVIII (2011) and Planck Collaboration, 2013 results XXX (2014).