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Exploiting orbital constraints from optical data to detect binary gamma-Ray pulsars
Authors
Bruce Allen
C.J. Clark
L. Nieder
H.J. Pletsch
Publication date
1 January 2020
Publisher
London : Institute of Physics Publ. (IOP)
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on
arXiv
Abstract
It is difficult to discover pulsars via their gamma-ray emission because current instruments typically detect fewer than one photon per million rotations. This creates a significant computing challenge for isolated pulsars, where the typical parameter search space spans wide ranges in four dimensions. It is even more demanding when the pulsar is in a binary system, where the orbital motion introduces several additional unknown parameters. Building on earlier work by Pletsch & Clark, we present optimal methods for such searches. These can also incorporate external constraints on the parameter space to be searched, for example, from optical observations of a presumed binary companion. The solution has two parts. The first is the construction of optimal search grids in parameter space via a parameter space metric, for initial semicoherent searches and subsequent fully coherent follow-ups. The second is a method to demodulate and detect the periodic pulsations. These methods have different sensitivity properties than traditional radio searches for binary pulsars and might unveil new populations of pulsars. © 2020. The Author(s). Published by the American Astronomical Society
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 11/04/2021
MPG.PuRe
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Last time updated on 19/11/2020