On the "The Kolmogorov-Smirnov test for the CMB" by M.Frommert, R.Durrer and J.Michaud

TL;DR

This paper critically examines the application of the Kolmogorov-Smirnov test and KSP to CMB data, highlighting interpretational issues and clarifying the method's implications for Gaussianity and features like cold spots.

Contribution

It provides a detailed critique of previous KSP applications to CMB, emphasizing the need for proper interpretation and addressing misconceptions about Gaussianity.

Findings

Identifies interpretational flaws in previous KSP analyses

Clarifies the correct application of the KSP method to CMB data

Highlights the importance of proper statistical interpretation in cosmological studies

Abstract

In arxiv:1108.5354 the Kolmogorov-Smirnov (K-S) test and Kolmogorov stochasticity parameter (KSP) is applied to CMB data. Their interpretation of the KSP method, however, lacks essential elements. In addition, their main result on the Gaussianity of CMB was not a matter of debate in previous KSP-CMB studies which also included predictions on cold spots, point sources.