All-sky search for periodic gravitational waves in the full S5 LIGO data

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Abadie, J.; Abbott, B.P.; Abbott, R.; Abbott, T.D.; Abernathy, M. et al.: All-sky search for periodic gravitational waves in the full S5 LIGO data. In: Physical Review D - Particles, Fields, Gravitation and Cosmology 85 (2012), Nr. 2, 22001. DOI: https://doi.org/10.1103/PhysRevD.85.022001

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Sum total of downloads: 88




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Abstract: 
We report on an all-sky search for periodic gravitational waves in the frequency band 50–800 Hz and with the frequency time derivative in the range of 0 through −6×10−9  Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our Galaxy. After recent improvements in the search program that yielded a 10× increase in computational efficiency, we have searched in two years of data collected during LIGO’s fifth science run and have obtained the most sensitive all-sky upper limits on gravitational-wave strain to date. Near 150 Hz our upper limit on worst-case linearly polarized strain amplitude h0 is 1×10−24, while at the high end of our frequency range we achieve a worst-case upper limit of 3.8×10−24 for all polarizations and sky locations. These results constitute a factor of 2 improvement upon previously published data. A new detection pipeline utilizing a loosely coherent algorithm was able to follow up weaker outliers, increasing the volume of space where signals can be detected by a factor of 10, but has not revealed any gravitational-wave signals. The pipeline has been tested for robustness with respect to deviations from the model of an isolated neutron star, such as caused by a low-mass or long-period binary companion. © 2012 The American Physical Society
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: article
Publishing status: publishedVersion
Issue Date: 2012
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 69 78.41%
2 image of flag of United States United States 5 5.68%
3 image of flag of Italy Italy 4 4.55%
4 image of flag of Hungary Hungary 2 2.27%
5 image of flag of Sweden Sweden 1 1.14%
6 image of flag of Japan Japan 1 1.14%
7 image of flag of France France 1 1.14%
8 image of flag of Denmark Denmark 1 1.14%
9 image of flag of Bulgaria Bulgaria 1 1.14%
10 image of flag of Austria Austria 1 1.14%
    other countries 2 2.27%

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