A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical origin. This background is a target for the current generation of ground-based detectors. In this article we present the first joint search for a stochastic background using data from the LIGO and Virgo interferometers. In a frequency band of 600-1000 Hz, we obtained a 95% upper limit on the amplitude of Î©GW(f) â‰¥Î©3(f/900Hz)3, of Î©3<0.32, assuming a value of the Hubble parameter of h100â‰¥0.71. These new limits are a factor of seven better than the previous best in this frequency band. Â© 2012 American Physical Society.
J. Abadie, et. al., (2012) Upper limits on a stochastic gravitational-wave background using LIGO and Virgo interferometers at 600-1000 Hz.Physical Review D - Particles, Fields, Gravitation and Cosmology85:12. DOI: http://doi.org/10.1103/PhysRevD.85.122001
Physical Review D - Particles, Fields, Gravitation and Cosmology