The data collected in May 1980 with two gravitational-wave antennas operated simultaneously, one (M=20 kg) in Rome, the other (M=389 kg) in Frascati, show a few high-energy events recorded by the two stations at times which differ by a few seconds. The probability for these «coincidences» to be accidental is of the order of 10−4. Various considerations tend to exclude that these events are due to gravitational waves of extraterrestrial origin. In addition, a few types of trivial local disturbances have been excluded. A study of the occurrence times of the events recorded at Frascati shows the presence of two periods (ℱ=53.1 and 54.7 min) equal to those of the free oscillations of the Earth:0 S 2 +1 and0 S 2 −1 .
Background Of Gravitational Wave Antennas Of Possible Terrestrial Origin. I.
COCCIA, EUGENIO
1981-01-01
Abstract
The data collected in May 1980 with two gravitational-wave antennas operated simultaneously, one (M=20 kg) in Rome, the other (M=389 kg) in Frascati, show a few high-energy events recorded by the two stations at times which differ by a few seconds. The probability for these «coincidences» to be accidental is of the order of 10−4. Various considerations tend to exclude that these events are due to gravitational waves of extraterrestrial origin. In addition, a few types of trivial local disturbances have been excluded. A study of the occurrence times of the events recorded at Frascati shows the presence of two periods (ℱ=53.1 and 54.7 min) equal to those of the free oscillations of the Earth:0 S 2 +1 and0 S 2 −1 .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
