Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/46005
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Type: Journal article
Title: Upper limit map of a background of gravitational waves
Author: Abbott, B.
Abbott, R.
Adhikari, R.
Agresti, J.
Ajith, P.
Allen, B.
Amin, R.
Anderson, S.
Anderson, W.
Arain, M.
Araya, M.
Armandula, H.
Ashley, M.
Aston, S.
Aufmuth, P.
Aulbert, C.
Babak, S.
Ballmer, S.
Bantilan, H.
Barish, B.
et al.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2007; 76(8):082003-1-082003-11
Publisher: American Physical Soc
Issue Date: 2007
ISSN: 1550-7998
1550-2368
Statement of
Responsibility: 
B. Abbott... A. Brooks... D. Hosken... D. Mudge... J. Munch... P. Veitch...et al. (LIGO Scientific Collaboration)
Abstract: We 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.
Rights: ©2007 American Physical Society
RMID: 0020074040
DOI: 10.1103/PhysRevD.76.082003
Appears in Collections:Chemistry and Physics publications
Environment Institute publications

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