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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6156
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dc.contributor.authorAasi, J.-
dc.contributor.authorAbbott, B.P.-
dc.contributor.authorAbbott, R.-
dc.contributor.authorIyer, B.R.-
dc.contributor.authorLIGO Scientific Collaboration and Virgo Collaboration-
dc.contributor.author+842 Co authors-
dc.date.accessioned2015-02-01T06:40:54Z-
dc.date.available2015-02-01T06:40:54Z-
dc.date.issued2015-01-15-
dc.identifier.citationPhysical Review D, 2015, Vol.91, p 022004en
dc.identifier.issn1550-7998-
dc.identifier.issn1550-2368(Online)-
dc.identifier.urihttp://hdl.handle.net/2289/6156-
dc.descriptionOpen Accessen
dc.description.abstractIn this paper we present the results of a coherent narrow-band search for continuous gravitational-wave signals from the Crab and Vela pulsars conducted on Virgo VSR4 data. In order to take into account a possible small mismatch between the gravitational-wave frequency and two times the star rotation frequency, inferred from measurement of the electromagnetic pulse rate, a range of 0.02 Hz around two times the star rotational frequency has been searched for both the pulsars. No evidence for a signal has been found and 95% confidence level upper limits have been computed assuming both that polarization parameters are completely unknown and that they are known with some uncertainty, as derived from x-ray observations of the pulsar wind torii. For Vela the upper limits are comparable to the spin-down limit, computed assuming that all the observed spin-down is due to the emission of gravitational waves. For Crab the upper limits are about a factor of 2 below the spin-down limit, and represent a significant improvement with respect to past analysis. This is the first time the spin-down limit is significantly overcome in a narrow-band search.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttp://arxiv.org/abs/1410.8310en
dc.relation.urihttp://dx.doi.org/10.1103/PhysRevD.91.022004en
dc.relation.urihttp://adsabs.harvard.edu/abs/2014arXiv1410.8310Ten
dc.rights2015 American Physical Societyen
dc.titleNarrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 dataen
dc.typeArticleen
Appears in Collections:Research Papers (TP)

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