Journal article
Search for continuous gravitational waves from ten H.E.S.S. sources using a hidden Markov model
D Beniwal, P Clearwater, L Dunn, A Melatos, D Ottaway
Physical Review D | AMER PHYSICAL SOC | Published : 2021
Abstract
Isolated neutron stars are prime targets for continuous-wave (CW) searches by ground-based gravitational-wave interferometers. Results are presented from a CW search targeting ten pulsars. The search uses a semicoherent algorithm, which combines the maximum-likelihood F-statistic with a hidden Markov model (HMM) to efficiently detect and track quasi-monochromatic signals which wander randomly in frequency. The targets, which are associated with TeV sources detected by the High Energy Stereoscopic System (H.E.S.S.), are chosen to test for gravitational radiation from young, energetic pulsars with strong γ-ray emission, and take maximum advantage of the frequency tracking capabilities of HMM c..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
The authors would like to express their gratitude towards Ling Sun, Meg Millhouse, Hannah Middleton, Patrick Meyers, Lucy Strang and Julian Carlin for numerous discussions and their ongoing support throughout this project. Additionally, we extend our special thank you to Prof. Gavin Rowell for discussions of the various HESS targets. This research is supported by the Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav) with Project No. CE170100004. This work was performed on the OzSTAR national facility at Swinburne University of Technology. The OzSTAR program receives funding in part from the Astronomy National Collaborative Research Infrastructure Strategy (NCRIS) allocation provided by the AustralianGovernment. This research has made use of data, software and/or web tools obtained from the GravitationalWave Open Science Center [117], a service of LIGOLaboratory, theLIGOScientific Collaboration and the VirgoCollaboration. LIGOLaboratory and AdvancedLIGO are funded by the United States National Science Foundation (NSF) as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, the Max-PlanckSociety (MPS), and the State of Niedersachsen/Germany for support of the construction of Advanced LIGO and construction and operation of the GEO600 detector. Additional support for Advanced LIGO was provided by the Australian Research Council. Virgo is funded, through the European Gravitational Observatory (EGO), by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale di Fisica Nucleare (INFN) and the Dutch Nikhef, with contributions by institutions from Belgium, Germany, Greece, Hungary, Ireland, Japan, Monaco, Poland, Portugal, Spain.