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Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data

Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data
Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data
In 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.
1550-7998
1-15
Aasi, J.
a1703202-cb8f-41a5-bfcf-57f149364535
Abbott, B.P.
20b32f53-5355-40eb-9d69-91c95d56e693
Abbott, R.
ceb7bd1e-f214-46dd-9972-a194692a86aa
Jones, D.I.
b8f3e32c-d537-445a-a1e4-7436f472e160
LIGO Scientific Collaboration and Virgo Collaboration
Aasi, J.
a1703202-cb8f-41a5-bfcf-57f149364535
Abbott, B.P.
20b32f53-5355-40eb-9d69-91c95d56e693
Abbott, R.
ceb7bd1e-f214-46dd-9972-a194692a86aa
Jones, D.I.
b8f3e32c-d537-445a-a1e4-7436f472e160

Aasi, J., Abbott, B.P. and Abbott, R. , LIGO Scientific Collaboration and Virgo Collaboration (2015) Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data. Physical Review D, 9 (2), 1-15, [022004]. (doi:10.1103/PhysRevD.91.022004).

Record type: Article

Abstract

In 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.

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PhysRevD.91.022004 - Other
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Published date: 21 January 2015
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 404331
URI: http://eprints.soton.ac.uk/id/eprint/404331
ISSN: 1550-7998
PURE UUID: 1b41dd77-7890-495e-8359-4780f2290ee8
ORCID for D.I. Jones: ORCID iD orcid.org/0000-0002-0117-7567

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Date deposited: 05 Jan 2017 16:37
Last modified: 16 Mar 2024 03:06

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Contributors

Author: J. Aasi
Author: B.P. Abbott
Author: R. Abbott
Author: D.I. Jones ORCID iD
Corporate Author: LIGO Scientific Collaboration and Virgo Collaboration

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