TY - JOUR
T1 - First cross-correlation analysis of interferometric and resonant-bar gravitational-wave data for stochastic backgrounds
AU - LIGO Scientific Collaboration
AU - ALLEGRO Collaboration
AU - Abbott, B.
AU - Abbott, R.
AU - Adhikari, R.
AU - Agresti, J.
AU - Ajith, P.
AU - Allen, B.
AU - Amin, R.
AU - Anderson, S. B.
AU - Anderson, W. G.
AU - Arain, M.
AU - Araya, M.
AU - Armandula, H.
AU - Ashley, M.
AU - Aston, S.
AU - Aufmuth, P.
AU - Aulbert, C.
AU - Babak, S.
AU - Ballmer, S.
AU - Bantilan, H.
AU - Barish, B. C.
AU - Barker, C.
AU - Barker, D.
AU - Barr, B.
AU - Barriga, P.
AU - Barton, M. A.
AU - Bayer, K.
AU - Belczynski, K.
AU - Betzwieser, J.
AU - Beyersdorf, P. T.
AU - Bhawal, B.
AU - Bilenko, I. A.
AU - Billingsley, G.
AU - Biswas, R.
AU - Black, E.
AU - Blackburn, K.
AU - Blackburn, L.
AU - Blair, D.
AU - Bland, B.
AU - Bogenstahl, J.
AU - Bogue, L.
AU - Bork, R.
AU - Boschi, V.
AU - Bose, S.
AU - Brady, P. R.
AU - Braginsky, V. B.
AU - Brau, J. E.
AU - Brinkmann, M.
AU - Brooks, A.
AU - Brown, D. A.
AU - Yunes, N.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2007/7/9
Y1 - 2007/7/9
N2 - Data from the LIGO Livingston interferometer and the ALLEGRO resonant-bar detector, taken during LIGO's fourth science run, were examined for cross correlations indicative of a stochastic gravitational-wave background in the frequency range 850-950 Hz, with most of the sensitivity arising between 905 and 925 Hz. ALLEGRO was operated in three different orientations during the experiment to modulate the relative sign of gravitational-wave and environmental correlations. No statistically significant correlations were seen in any of the orientations, and the results were used to set a Bayesian 90% confidence level upper limit of Ωgw(f)≤1.02, which corresponds to a gravitational-wave strain at 915 Hz of 1.5×10-23Hz-1/2. In the traditional units of h1002Ωgw(f), this is a limit of 0.53, 2 orders of magnitude better than the previous direct limit at these frequencies. The method was also validated with successful extraction of simulated signals injected in hardware and software.
AB - Data from the LIGO Livingston interferometer and the ALLEGRO resonant-bar detector, taken during LIGO's fourth science run, were examined for cross correlations indicative of a stochastic gravitational-wave background in the frequency range 850-950 Hz, with most of the sensitivity arising between 905 and 925 Hz. ALLEGRO was operated in three different orientations during the experiment to modulate the relative sign of gravitational-wave and environmental correlations. No statistically significant correlations were seen in any of the orientations, and the results were used to set a Bayesian 90% confidence level upper limit of Ωgw(f)≤1.02, which corresponds to a gravitational-wave strain at 915 Hz of 1.5×10-23Hz-1/2. In the traditional units of h1002Ωgw(f), this is a limit of 0.53, 2 orders of magnitude better than the previous direct limit at these frequencies. The method was also validated with successful extraction of simulated signals injected in hardware and software.
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U2 - 10.1103/PhysRevD.76.022001
DO - 10.1103/PhysRevD.76.022001
M3 - Article
AN - SCOPUS:34447268891
VL - 76
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 2
M1 - 022001
ER -