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arXiv · 1902.06636

Point Source Detection and False Discovery Rate Control on CMB Maps

Javier Carrón Duque·Alessandro Buzzelli·Yabebal Fantaye·Domenico Marinucci·Armin Schwartzman·Nicola Vittorio
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Abstract

We discuss a new procedure to search for point sources in Cosmic Microwave background maps; in particular, we aim at controlling the so-called False Discovery Rate, which is defined as the expected value of false discoveries among pixels which are labelled as contaminated by point sources. We exploit a procedure called STEM, which is based on the following four steps: 1) needlet filtering of the observed CMB maps, to improve the signal to noise ratio; 2) selection of candidate peaks, i.e., the local maxima of filtered maps; 3) computation of \emph{p-}values for local maxima; 4) implementation of the multiple testing procedure, by means of the so-called Benjamini-Hochberg method. Our procedures are also implemented on the latest release of Planck CMB maps.

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Javier Carrón Duque, Alessandro Buzzelli, Yabebal Fantaye, Domenico Marinucci, Armin Schwartzman, Nicola Vittorio. 2019-02-18. Point Source Detection and False Discovery Rate Control on CMB Maps. https://arxiv.org/abs/1902.06636

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