Hierarchical follow-up of subthreshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data

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Papa, M.A.; Eggenstein, H.-B.; Walsh, S.; Di Palma, I.; Allen, B. et al.: Hierarchical follow-up of subthreshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data. In: Physical Review D 94 (2016), Nr. 12, 122006. DOI: https://doi.org/10.1103/PhysRevD.94.122006

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We report results of an all-sky search for periodic gravitational waves with frequency between 50 and 510 Hz from isolated compact objects, e.g., neutron stars. A new hierarchical multistage approach is taken, supported by the computing power of the Einstein@Home project, allowing us to probe more deeply than ever before. 16 million subthreshold candidates from the initial search [LIGO Scientific and Virgo Collaborations, Phys. Rev. D 94, 102002 (2016)] are followed up in four stages. None of those candidates is consistent with an isolated gravitational wave emitter, and 90% confidence level upper limits are placed on the amplitudes of continuous waves from the target population. Between 170.5 and 171 Hz, we set the most constraining 90% confidence upper limit on the strain amplitude h0 at 4.3×10-25, while at the high end of our frequency range, we achieve an upper limit of 7.6×10-25. These are the most constraining all-sky upper limits to date and constrain the ellipticity of rotating compact objects emitting at 300 Hz at a distance D to less than 6×10-7 [D100 pc].
License of this version: CC BY 3.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Fakultät für Mathematik und Physik

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1 image of flag of Germany Germany 70 87.50%
2 image of flag of China China 6 7.50%
3 image of flag of United States United States 1 1.25%
4 image of flag of Romania Romania 1 1.25%
5 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 1 1.25%
6 image of flag of Switzerland Switzerland 1 1.25%

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