All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data

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dc.contributor.author Roy, Soumen
dc.contributor.author Sengupta, Anand S.
dc.contributor.author et al.
dc.coverage.spatial United States of America
dc.date.accessioned 2021-11-10T09:32:18Z
dc.date.available 2021-11-10T09:32:18Z
dc.date.issued 2021-10
dc.identifier.citation Roy, Soumen and Sengupta, Anand S. et al., "All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data", Physical Review D, DOI: 10.1103/PhysRevD.104.082004, vol. 104, no. 8, Oct. 2021. en_US
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.uri https://doi.org/10.1103/PhysRevD.104.082004
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/7254
dc.description.abstract We report on an all-sky search for continuous gravitational waves in the frequency band 20–2000 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×10−8  Hz/s. Such a signal could be produced by a nearby, spinning and slightly nonaxisymmetric isolated neutron star in our Galaxy. This search uses the LIGO data from the first six months of Advanced LIGO’s and Advanced Virgo’s third observational run, O3. No periodic gravitational wave signals are observed, and 95% confidence-level (C.L.) frequentist upper limits are placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼1.7×10−25 near 200 Hz. For a circularly polarized source (most favorable orientation), the lowest upper limits are ∼6.3×10−26. These strict frequentist upper limits refer to all sky locations and the entire range of frequency derivative values. For a population-averaged ensemble of sky locations and stellar orientations, the lowest 95% C.L. upper limits on the strain amplitude are ∼1.4×10−25. These upper limits improve upon our previously published all-sky results, with the greatest improvement (factor of ∼2) seen at higher frequencies, in part because quantum squeezing has dramatically improved the detector noise level relative to the second observational run, O2. These limits are the most constraining to date over most of the parameter space searched.
dc.description.statementofresponsibility by Soumen Roy and Anand S. Sengupta, et al.
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.subject Gravitation en_US
dc.subject Experimental studies of gravity en_US
dc.subject Astrophysical studies of gravity en_US
dc.subject Gravitational wave detection en_US
dc.subject Gravitational wave sources en_US
dc.title All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data en_US
dc.type Article en_US
dc.relation.journal Physical Review D


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