Search for continuous gravitational waves from HESS J1427-608 with a hidden Markov model

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dc.contributor.authorBeniwal, D.
dc.contributor.authorClearwater, P.
dc.contributor.authorDunn, L.
dc.contributor.authorStrang, L.
dc.contributor.authorRowell, G.
dc.contributor.authorMelatos, A.
dc.contributor.authorOttaway, D.
dc.date.issued2022
dc.descriptionPublished 15 November 2022
dc.description.abstractWe present a search for continuous gravitational-wave signals from an unidentified pulsar potentially poweringHESS J1427-608, a spatially unresolvedTeVpoint source detected by the HighEnergy Stereoscopic System (HESS). The search uses a semicoherent algorithm, which combines the maximum likelihood F statistic with a hidden Markov model to efficiently detect and track quasimonochromatic signals that wander randomly in frequency. It uses data from the second observing run of the Advanced Laser Interferometer Gravitational-Wave Observatory. Multiwavelength observations of the HESS source are combined with the proprieties of the population of TeV-bright pulsar wind nebulae to constrain the search parameters.We find no evidence of gravitational-wave emission from this target.We set upper limits on the characteristic wave strain h95% 0 (for circularly polarized signals) at95%confidence level in sample subbands and interpolate it to estimate the sensitivity in the full band. We find h95% 0 ¼ 1.3 × 10−25 near 185 Hz. The implied constraints on the ellipticity and r-mode amplitude reach ϵ ≤ 10−5 and α ≤ 10−3 at 200 Hz, respectively.
dc.description.statementofresponsibilityDeeksha Beniwal, Patrick Clearwater, Liam Dunn, Lucy Strang, Gavin Rowell, Andrew Melatos, and David Ottaway
dc.identifier.citationPhysical Review D (particles, fields, gravitation, and cosmology), 2022; 106(10):103018-1-103018-15
dc.identifier.doi10.1103/physrevd.106.103018
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.orcidOttaway, D. [0000-0001-6794-1591]
dc.identifier.urihttps://hdl.handle.net/2440/137353
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/CE170100004
dc.rights© 2022 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevd.106.103018
dc.titleSearch for continuous gravitational waves from HESS J1427-608 with a hidden Markov model
dc.typeJournal article
pubs.publication-statusPublished

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