Upper limit map of a background of gravitational waves

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dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, R.
dc.contributor.authorAdhikari, R.
dc.contributor.authorAgresti, J.
dc.contributor.authorAjith, P.
dc.contributor.authorAllen, B.
dc.contributor.authorAmin, R.
dc.contributor.authorAnderson, S.
dc.contributor.authorAnderson, W.
dc.contributor.authorArain, M.
dc.contributor.authorAraya, M.
dc.contributor.authorArmandula, H.
dc.contributor.authorAshley, M.
dc.contributor.authorAston, S.
dc.contributor.authorAufmuth, P.
dc.contributor.authorAulbert, C.
dc.contributor.authorBabak, S.
dc.contributor.authorBallmer, S.
dc.contributor.authorBantilan, H.
dc.contributor.authorBarish, B.
dc.contributor.authoret al.
dc.date.issued2007
dc.description.abstractWe searched for an anisotropic background of gravitational waves using data from the LIGO S4 science run and a method that is optimized for point sources. This is appropriate if, for example, the gravitational wave background is dominated by a small number of distinct astrophysical sources. No signal was seen. Upper limit maps were produced assuming two different power laws for the source strain power spectrum. For an f^-3 power law and using the 50 Hz to 1.8 kHz band the upper limits on the source strain power spectrum vary between 1.2e-48 Hz^-1 (100 Hz/f)^3 and 1.2e-47 Hz^-1 (100 Hz /f)^3, depending on the position in the sky. Similarly, in the case of constant strain power spectrum, the upper limits vary between 8.5e-49 Hz^-1 and 6.1e-48 Hz^-1. As a side product a limit on an isotropic background of gravitational waves was also obtained. All limits are at the 90% confidence level. Finally, as an application, we focused on the direction of Sco-X1, the closest low-mass X-ray binary. We compare the upper limit on strain amplitude obtained by this method to expectations based on the X-ray luminosity of Sco-X1.
dc.description.statementofresponsibilityB. Abbott... A. Brooks... D. Hosken... D. Mudge... J. Munch... P. Veitch...et al. (LIGO Scientific Collaboration)
dc.identifier.citationPhysical Review D: Particles, Fields, Gravitation and Cosmology, 2007; 76(8):082003-1-082003-11
dc.identifier.doi10.1103/PhysRevD.76.082003
dc.identifier.issn1550-7998
dc.identifier.issn1550-2368
dc.identifier.orcidOttaway, D. [0000-0001-6794-1591]
dc.identifier.orcidVeitch, P. [0000-0002-2597-435X]
dc.identifier.urihttp://hdl.handle.net/2440/46005
dc.language.isoen
dc.publisherAmerican Physical Soc
dc.rights©2007 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevd.76.082003
dc.titleUpper limit map of a background of gravitational waves
dc.typeJournal article
pubs.publication-statusPublished

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