dc.contributor.author |
Abbott, B. P. |
|
dc.contributor.author |
Davies, G. S. |
|
dc.contributor.author |
LIGO Scientific Collaboration and Virgo Collaboration |
|
dc.date.accessioned |
2017-07-18T14:26:17Z |
|
dc.date.available |
2017-07-18T14:26:17Z |
|
dc.date.issued |
2017-04 |
|
dc.identifier.citation |
Abbott, BP., et al., (LIGO Scientific Collaboration and Virgo Collaboration). Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544. Physical Review D, 95(8) 082005 (2017) |
en_UK |
dc.identifier.uri |
http://dspace.lib.cranfield.ac.uk/handle/1826/12207 |
|
dc.identifier.uri |
https://doi.org/10.1103/physrevd.95.082005 |
|
dc.description.abstract |
We describe a directed search for continuous gravitational waves in data from the sixth initial LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of ≈2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0×10⁻²⁵ on intrinsic strain and 8.5×10⁻⁶ on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spin-down ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method is used extensively in searches of Advanced LIGO and Virgo detector data. |
en_UK |
dc.language.iso |
en |
en_UK |
dc.publisher |
American Physical Society |
en_UK |
dc.rights |
© 2017 American Physical Society. This is the publisher Version of Record Manuscript. Please refer to any applicable publisher terms of use. |
|
dc.title |
Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544 |
en_UK |
dc.type |
Article |
en_UK |