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.
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
21 January 2015
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), , [022004].
(doi:10.1103/PhysRevD.91.022004).
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.
Text
PhysRevD.91.022004
- Other
Restricted to Repository staff only
Request a copy
More information
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
Catalogue record
Date deposited: 05 Jan 2017 16:37
Last modified: 16 Mar 2024 03:06
Export record
Altmetrics
Contributors
Author:
J. Aasi
Author:
B.P. Abbott
Author:
R. Abbott
Corporate Author: LIGO Scientific Collaboration and Virgo Collaboration
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
