A semicoherent glitch-robust continuous-gravitational-wave search method

Isolated nonaxisymmetric rotating neutron stars producing continuous-gravitational-wave signals may undergo occasional spin-up events known as glitches. If unmodeled by a search, these glitches can result in continuous wave signals being missed or misidentified as detector artifacts. We outline a se...

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Bibliographic Details
Published in:Physical review. D 2018-09, Vol.98 (6), p.063011, Article 063011
Main Authors: Ashton, G., Prix, R., Jones, D. I.
Format: Article
Language:English
Subjects:
Computer simulation
Continuous radiation
Gravitation
Gravitational waves
Markov analysis
Markov chains
Monte Carlo simulation
Neutron stars
Parameters
Search methods
Stellar rotation
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Summary:Isolated nonaxisymmetric rotating neutron stars producing continuous-gravitational-wave signals may undergo occasional spin-up events known as glitches. If unmodeled by a search, these glitches can result in continuous wave signals being missed or misidentified as detector artifacts. We outline a semicoherent glitch-robust search method that allows identification of continuous wave signal candidates that contain glitches and inferences about the model parameters. We demonstrate how this can be applied to the follow-up of candidates found by wide-parameter space searches. We find that a Markov chain Monte Carlo method outperforms a grid-based method in speed and accuracy.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.98.063011