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          Institute: MPI für Gravitationsphysik     Collection: Observational Relativity and Cosmology     Display Documents



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ID: 438199.0, MPI für Gravitationsphysik / Observational Relativity and Cosmology
Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
Authors:Pletsch, Holger J.; Allen, Bruce
Date of Publication (YYYY-MM-DD):2009
Title of Journal:Physical Review Letters
Volume:103
Sequence Number of Article:181102
Review Status:not specified
Audience:Not Specified
Abstract / Description:Fully coherent searches (over realistic ranges of parameter space and year-long observation times) for unknown sources of continuous gravitational waves are computationally prohibitive. Less expensive hierarchical searches divide the data into shorter segments which are analyzed coherently, then detection statistics from different segments are combined incoherently. The novel method presented here solves the long-standing problem of how best to do the incoherent combination. The optimal solution exploits large-scale parameter-space correlations in the coherent detection statistic. Application to simulated data shows dramatic sensitivity improvements compared with previously available (ad hoc) methods, increasing the spatial volume probed by more than 2 orders of magnitude at lower computational cost.
External Publication Status:published
Document Type:Article
Communicated by:Bruce Allen
Affiliations:MPI für Gravitationsphysik/Observational Relativity and Cosmology
MPI für Gravitationsphysik/Teilinstitut Hannover
Identifiers:DOI:10.1103/PhysRevLett.103.181102
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