Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors

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dc.identifier.uri http://dx.doi.org/10.15488/2125
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/2150
dc.contributor.author Aasi, J.
dc.contributor.author Allen, Bruce
dc.contributor.author Ast, Stefan
dc.contributor.author Aufmuth, Peter
dc.contributor.author Danzmann, Karsten
dc.contributor.author Kaufer, S.
dc.contributor.author Lück, Harald
dc.contributor.author Meier, Tobias
dc.contributor.author Schnabel, R.
dc.contributor.author Vahlbruch, H.
dc.contributor.author Willke, Benno
dc.contributor.author et al.
dc.contributor.author LIGO Scientific Collaboration
dc.contributor.author Virgo Collaboration
dc.date.accessioned 2017-10-26T07:04:24Z
dc.date.available 2017-10-26T07:04:24Z
dc.date.issued 2015
dc.identifier.citation Aasi, J.; Abadie, J.; Abbott, B.P.; Abbott, R.; Abbott, T. et al.: Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors. In: Physical Review D - Particles, Fields, Gravitation and Cosmology 91 (2015), Nr. 2, No. 22003. DOI: https://doi.org/10.1103/PhysRevD.91.022003
dc.description.abstract Searches for a stochastic gravitational-wave background (SGWB) using terrestrial detectors typically involve cross-correlating data from pairs of detectors. The sensitivity of such cross-correlation analyses depends, among other things, on the separation between the two detectors: the smaller the separation, the better the sensitivity. Hence, a colocated detector pair is more sensitive to a gravitational-wave background than a noncolocated detector pair. However, colocated detectors are also expected to suffer from correlated noise from instrumental and environmental effects that could contaminate the measurement of the background. Hence, methods to identify and mitigate the effects of correlated noise are necessary to achieve the potential increase in sensitivity of colocated detectors. Here we report on the first SGWB analysis using the two LIGO Hanford detectors and address the complications arising from correlated environmental noise. We apply correlated noise identification and mitigation techniques to data taken by the two LIGO Hanford detectors, H1 and H2, during LIGO’s fifth science run. At low frequencies, 40–460 Hz, we are unable to sufficiently mitigate the correlated noise to a level where we may confidently measure or bound the stochastic gravitational-wave signal. However, at high frequencies, 460–1000 Hz, these techniques are sufficient to set a 95% confidence level upper limit on the gravitational-wave energy density of Ω(f)<7.7×10−4(f/900  Hz)3, which improves on the previous upper limit by a factor of ∼180. In doing so, we demonstrate techniques that will be useful for future searches using advanced detectors, where correlated noise (e.g., from global magnetic fields) may affect even widely separated detectors. © 2015 The American Physical Society eng
dc.language.iso eng
dc.publisher College Park, MD : American Physical Society
dc.relation.ispartofseries Physical Review D 91 (2015), Nr. 2
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject Stochastic Gravitational-Wave Background eng
dc.subject Gravitational waves eng
dc.subject Gravitationswelle ger
dc.subject.ddc 530 | Physik ger
dc.title Searching for stochastic gravitational waves using data from the two colocated LIGO Hanford detectors eng
dc.type article
dc.type Text
dc.relation.issn 2470-0010
dc.relation.doi https://doi.org/10.1103/PhysRevD.91.022003
dc.bibliographicCitation.issue 2
dc.bibliographicCitation.volume 91
dc.bibliographicCitation.firstPage 22003
dc.description.version publishedVersion
tib.accessRights frei zug�nglich


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