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The VIRGO Project: A wide band antenna for gravitational wave detection
Abstract The status of advancement of the VIRGO Project is presented: the first-generation results from the Pisa seismic noise super attenuator give an upper limit to the noise transfer function of 2… Expand
Test of the weak-equivalence principle in an Einstein elevator
SummaryA technique for testing the weak-equivalence principle is presented. This technique involves the measurement of differential accelerations between two test masses of different materials (e.g.,… Expand
Testing deviations from the inverse square law with a freely falling gravity gradiometer at Balloon altitudes
SummaryWe discuss a null experiment to search for the fifth force at ranges around 10 km. It is proposed to use a three-axis gravity gradiometer to measure the trace of the Earth gravity tensor from… Expand
Evidence for long-period sporadic pulsations in the hard X-ray flux of Cygnus X-1.
COSMIC X-RAY SOURCES IN THE 20 TO 180 keV ENERGY RANGE.
The effect of dead time on the power spectral density estimates of discrete time series
Abstract A study of the bias introduced on the power spectral density (PSD) of discrete time series by the presence of a fixed dead time in the detection system has been performed. Both the cases of… Expand
Measurement of small forces in the physics of gravitation and geophysics (
The measurement of weak forces or accelerations is of fundamental importance in a variety of problems in science and technology. This topic is addressed in this paper with particular attention to… Expand
Energy spectrum variability of Cygnus X-1 in hard X-rays
Hard X-ray emission from NGC 4151 and MCG 8-11-11 regions