Analysis of the "Ulitka" noise background as an anti-coincidence filter for the OGRAN gravitational-wave antennaстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:An analysis of experimental data from the "Ulitka" high-frequency gravitational-gradient meter installed in the underground Baksan Neutrino Observatory of the Russian Academy of Sciences is presented, focusing on the planned use of this instrument as an "anti-coincidence filter" for the OGRAN gravitational-wave antenna. The statistics of the Ulitka noise background over a year's observing are analyzed, and compared with the background measured earlier when Ulitka was located on the territory of the Sternberg Astronomical Institute in Moscow. A reduction in the rate of occurrence of large nonthermal spikes is noted. We have found associations between earthquakes and excitations of the seismically isolated high-frequency mode of the longitudinal oscillations of Ulitka.