Bayesian F -statistic-based parameter estimation of continuous gravitational waves from known pulsars

Author:

Ashok A.12ORCID,Covas P. B.12ORCID,Prix R.12ORCID,Papa M. A.12ORCID

Affiliation:

1. Max Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, Germany

2. Leibniz Universität Hannover, D-30167 Hannover, Germany

Abstract

We present a new method and implementation to obtain Bayesian posteriors on the amplitude parameters {h0,cosι,ψ,ϕ0} of continuous gravitational waves emitted by known pulsars. This approach leverages the well-established F-statistic framework and software. We further explore the benefits of employing a likelihood function that is analytically marginalized over ϕ0, which avoids signal degeneracy problems in the ψϕ0 subspace. The method is tested on simulated signals, hardware injections in Advanced-LIGO detector data, and by performing percentile-percentile self-consistency tests of the posteriors via Monte-Carlo simulations. We apply our methodology to PSR J1526-2744, a recently discovered millisecond pulsar. We find no evidence for a signal and obtain a Bayesian upper limit h095% on the gravitational-wave amplitude of approximately 7×1027, comparable with a previous frequentist upper limit. Published by the American Physical Society 2024

Funder

European Commission

HORIZON EUROPE Marie Sklodowska-Curie Actions

Publisher

American Physical Society (APS)

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