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ID: 439762.0, MPI für Gravitationsphysik / Observational Relativity and Cosmology
Targeted search for continuous gravitational waves: Bayesian versus maximum-likelihood statistics
Authors:Prix, Reinhard; Krishnan, Badri
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Classical and Quantum Gravity
Volume:26
Issue / Number:20
Sequence Number of Article:204013
Review Status:not specified
Audience:Not Specified
Abstract / Description:We investigate the Bayesian framework for detection of continuous gravitational waves (GWs) in the context of targeted searches, where the phase evolution of the GW signal is assumed to be known, while the four amplitude parameters are unknown. We show that the orthodox maximum-likelihood statistic (known as {\cal F} -statistic) can be rediscovered as a Bayes factor with an unphysical prior in amplitude parameter space. We introduce an alternative detection statistic ('{\cal B} -statistic') using the Bayes factor with a more natural amplitude prior, namely an isotropic probability distribution for the orientation of GW sources. Monte Carlo simulations of targeted searches show that the resulting Bayesian {\cal B} -statistic is more powerful in the Neyman–Pearson sense (i.e., has a higher expected detection probability at equal false-alarm probability) than the frequentist {\cal F} -statistic.
External Publication Status:published
Document Type:Article
Communicated by:Bruce Allen
Affiliations:MPI für Gravitationsphysik/Teilinstitut Hannover
MPI für Gravitationsphysik/Observational Relativity and Cosmology
Identifiers:ISI:000270514600014 [ID No:1]
ISSN:10.1088/0264-9381/26/20/204013 [ID No:2]
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