1107.1863
Non-Gaussian extrema counts for CMB maps
Pogosyan, Pichon, Gay
Assuming isotropic random field, and its gradient and invariants of the Hessian, calculate 2d differential extrema counts as a function of the excursion set threshold derived from the full moments expansion of the random field (like BBKS?). It's a geometrical analysis of weakly non-G CMB maps: An analytic expressions for these counts are given to second order in the non-G correction; can be calculated to arbitrary order using Monte Carlo method. Demonstrate with matching count estimators on "Planck" data.
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