Stochastic backgrounds of gravitational waves and spherical detectors

The analysis of how a stochastic background of gravitational radiation interacts with a spherical detector is given in detail, which leads to explicit expressions for the system response functions, as well as for the cross-correlation matrix of different readout channels. It is shown that distinctiv...

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Bibliographic Details
Published in:arXiv.org 2002-06
Main Authors: Lobo, J Alberto, Montero, Alvaro
Format: Article
Language:English
Subjects:
Background radiation
Correlation analysis
Gravitation
Gravitational waves
Response functions
Spherical antennas
Spherical waves
Online Access:Get full text
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Summary:The analysis of how a stochastic background of gravitational radiation interacts with a spherical detector is given in detail, which leads to explicit expressions for the system response functions, as well as for the cross-correlation matrix of different readout channels. It is shown that distinctive features of GW induced random detector excitations, relative to locally generated noise, are in practice insufficient to separate the signal from the noise by means of a single sphere, if prior knowledge on the GW spectral density is nil. The situation significantly improves when such previous knowledge is available, due to the omnidirectionality and multimode capacities of a spherical GW antenna.
ISSN:2331-8422
DOI:10.48550/arxiv.0206062