caa a22 4500 469076542 CHVBK 20180323132936.0 cr unu---uuuuu 170328e19921101xx s 000 0 eng 10.1007/BF02506687 doi (NATIONALLICENCE)springer-10.1007/BF02506687 The ALTAIR cryogenic gravitational-wave experiment [Elektronische Daten] [P. Bonifazi, M. Visco] Summary: We report on the experimental results obtained with the cryogenic Gravitational-Wave resonant detector ALTAIR located in Frascati (Italy) at the Istituto di Fisica dello Spazio Interplanetario of Consiglio Nazionale delle Ricerche. The peculiarity of this experiment is its working frequency. The first longitudinal mode of resonance of the antenna is at 1.8 kHz. The antenna, now equipped with a resonant capacitive transducer and a d.c. SQUID preamplifier, after a first test in November 1989, has operated almost continuously from May 1990. The best sensitivity, recently reached, expressed in terms of the effective noise temperatureT eff, is 20 mK, corresponding, for a short pulse of gravitational wave, to a metric perturbationh of 3 × 10-18. In the last period of measurements (from April 1991 to March 1992) two other antennas were operating: the Explorer antenna (2300 kg,T= 2.0 K) at CERN in Geneva and the LSU antenna (2500 kg,T = 4.2 K) at Louisiana State University in USA, both having a resonant frequency below 1 kHz. The data of these three detectors can be remote observed, in real time, by the international computer network. Coincidence analysis between the data of these three detectors is in progress. Società Italiana di Fisica, 1992 04.80 nationallicence Experimental tests of general relativity and observations of gravitational radiation nationallicence 95.85 nationallicence Astronomical observations nationallicence Bonifazi P. Istituto di Fisica dello Spazio Interplanetario del CNR, Frascati, Italia aut Visco M. Istituto di Fisica dello Spazio Interplanetario del CNR, Frascati, Italia aut Il Nuovo Cimento C Società Italiana di Fisica 15/6(1992-11-01), 943-954 0390-5551 15:6<943 1992 15 11543 https://doi.org/10.1007/BF02506687 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02506687 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bonifazi P. Istituto di Fisica dello Spazio Interplanetario del CNR, Frascati, Italia aut NATIONALLICENCE 700 1- Visco M. Istituto di Fisica dello Spazio Interplanetario del CNR, Frascati, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Società Italiana di Fisica 15/6(1992-11-01), 943-954 0390-5551 15:6<943 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer