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  Exploiting orbital constraints from optical data to detect binary gamma-ray pulsars

Nieder, L., Allen, B., Clark, C. J., & Pletsch, H. J. (2020). Exploiting orbital constraints from optical data to detect binary gamma-ray pulsars. The Astrophysical Journal, 901(2): 156. doi:10.3847/1538-4357/abaf53.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-4651-F Version Permalink: http://hdl.handle.net/21.11116/0000-0007-4655-B
Genre: Journal Article

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 Creators:
Nieder, L.1, Author              
Allen, B.1, Author              
Clark, C. J., Author
Pletsch, H. J.2, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              
2Pulsar Observation and Data Analysis, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2253649              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM,General Relativity and Quantum Cosmology, gr-qc
 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 (arXiv:1408.6962), 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 semi-coherent 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.

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 Dates: 2020-04-242020
 Publication Status: Published in print
 Pages: 32 pages, 7 figures
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 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2004.11740
DOI: 10.3847/1538-4357/abaf53
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 901 (2) Sequence Number: 156 Start / End Page: - Identifier: -