Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/106232
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Type: Journal article
Title: Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544
Author: Abbott, B.
Abbott, R.
Abbott, T.
Abernathy, M.
Acernese, F.
Ackley, K.
Adams, C.
Adams, T.
Addesso, P.
Adhikari, R.
Adya, V.
Affeldt, C.
Agathos, M.
Agatsuma, K.
Aggarwal, N.
Aguiar, O.
Aiello, L.
Ain, A.
Allen, B.
Allocca, A.
et al.
Citation: Physical Review D, 2017; 95(8):082005-1-082005-15
Publisher: American Physical Society
Issue Date: 2017
ISSN: 2470-0010
2470-0029
Statement of
Responsibility: 
B. P. Abbott … M. R. Abernathy … Won Kim … Jesper Munch … David J Ottaway … Peter J Veitch … et al. (LIGO Scientific Collaboration and Virgo Collaboration)
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.
Rights: © 2017 American Physical Society
DOI: 10.1103/PhysRevD.95.082005
Published version: http://dx.doi.org/10.1103/physrevd.95.082005
Appears in Collections:Aurora harvest 3
Physics publications

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