The stochastic background of gravitational waves
is noise, produced by a high number of uncorrelated events.
It may be of cosmological origin or of astrophysical origin.
The sensitivity of the detectors
to this background is a function of
their noise spectral amplitude (1/sqrt(Hz)) and of the square root of observation time and frequency bandwidth .
At least two detectors, properly located and aligned, are needed to do a measure.
Read this note on the
stochastic g.w. search !
We have done a
crosscorrelation analysis of the data recorded by the gravitational
wave (g.w.) resonant detectors Explorer and Nautilus, to obtain
information on the g.w. stochastic background. We have found that
The procedure and the
results have been published (Astronomy Astroph. 351,811-814 (1999))
this is the PDF file and this is Fig.1 this is Fig. 2
Another paper on results obtained using the data of Explorer and Nautilus is: "Upper limit for g.w. stochastic background with the Explorer and Nautilus resonant detectors" (Physics Letters B 385 (1996))
click here !
Papers describing the analysis
procedures and the limit we may reach are in:
Stochastic background of g.w. (2000, Proc. GWDAW Rome)
Resonant antennas for stochastic background measurements (CQG,1997)
Spectral tecqniques for stochastic background measurements (1997, Proc. GWDAW, Orsay)