1985 年 54 巻 5 号 p. 1697-1699
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.
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