Detection of gravitational waves using a network of detectors

Bose, Sukanta ; Dhurandhar, Sanjeev V. ; Pai, Archana (1999) Detection of gravitational waves using a network of detectors Pramana - Journal of Physics, 53 (6). pp. 1125-1136. ISSN 0304-4289

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We formulate the data analysis problem for the detection of the Newtonian coalescing-binary signal by a network of laser interferometric gravitational wave detectors that have arbitrary orientations, but are located at the same site. We use the maximum likelihood method for optimizing the detection problem. We show that for networks comprising of up to three detectors, the optimal statistic is just the matched network-filter. Alternatively, it is simply a linear combination of the signal-to-noise ratios of the individual detectors. This statistic, therefore, can be interpreted as the signal-to-noise ratio of the network. The overall sensitivity of the network is shown to increase roughly as the square-root of the number of detectors in the network. We further show that these results continue to hold even for the restricted post-Newtonian filters. Finally, our formalism is general enough to be extended, in a straightforward way, to address the problem of detection of such waves from other sources by some other types of detectors, eg., bars or spheres, or even by networks of spatially well-separated detectors.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Gravitational Radiation; Interferometric Detector; Coalescing Binary; Data Analysis
ID Code:87731
Deposited On:21 Mar 2012 09:57
Last Modified:19 May 2016 02:56

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