Search for Background Gravitational Radiation

Abstract

We present the result of a preliminary experiment determining an upper limit of the density of the background gravitational radiation at 8.6 kHz. The outputs of a pair of resonant antennas operating at room temperature are directly correlated retaining their phases. After 50 hours of observation, the energy density of the radiation is found to be (1.0±1.2)×10⁻⁵ J m⁻³Hz⁻¹.