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Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run

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dc.contributor.author LIGO Scientific Collaboration en_US
dc.contributor.author Virgo Collaboration en_US
dc.contributor.author KAGRA Collaboration en_US
dc.contributor.author Abbott, R. en_US
dc.contributor.author RAPOL, UMAKANT D. en_US
dc.contributor.author SOURADEEP, TARUN et al . en_US
dc.date.accessioned 2022-07-22T10:55:47Z
dc.date.available 2022-07-22T10:55:47Z
dc.date.issued 2022-06 en_US
dc.identifier.citation Astrophysical Journal, 932(2). en_US
dc.identifier.issn 0004-637X en_US
dc.identifier.issn 1538-4357 en_US
dc.identifier.uri https://doi.org/10.3847/1538-4357/ac6ad0 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/7269
dc.description.abstract Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully coherent search for such signals from eighteen pulsars in data from LIGO and Virgo's third observing run (O3). For known pulsars, efficient and sensitive matched-filter searches can be carried out if one assumes the gravitational radiation is phase-locked to the electromagnetic emission. In the search presented here, we relax this assumption and allow both the frequency and the time derivative of the frequency of the gravitational waves to vary in a small range around those inferred from electromagnetic observations. We find no evidence for continuous gravitational waves, and set upper limits on the strain amplitude for each target. These limits are more constraining for seven of the targets than the spin-down limit defined by ascribing all rotational energy loss to gravitational radiation. In an additional search, we look in O3 data for long-duration (hours–months) transient gravitational waves in the aftermath of pulsar glitches for six targets with a total of nine glitches. We report two marginal outliers from this search, but find no clear evidence for such emission either. The resulting duration-dependent strain upper limits do not surpass indirect energy constraints for any of these targets. en_US
dc.language.iso en en_US
dc.publisher IOP Publishing en_US
dc.subject Gravitational wave astronomy en_US
dc.subject Neutron stars en_US
dc.subject Pulsars en_US
dc.subject 2022-JUL-WEEK2 en_US
dc.subject TOC-JUL-2022 en_US
dc.subject 2022 en_US
dc.title Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run en_US
dc.type Article en_US
dc.contributor.department Dept. of Physics en_US
dc.identifier.sourcetitle Astrophysical Journal en_US
dc.publication.originofpublisher Foreign en_US


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