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  Random template banks and relaxed lattice coverings

Messenger, C., Prix, R., & Papa, M. A. (2009). Random template banks and relaxed lattice coverings. Physical Review D., 79(10): 104017. doi:10.1103/PhysRevD.79.104017.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-40D3-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-40D5-2
Genre: Journal Article

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PRD79-104017.pdf (Publisher version), 878KB
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 Creators:
Messenger, Christopher1, Author              
Prix, Reinhard1, Author              
Papa, Maria Alessandra2, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24011              
2Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24013              

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Free keywords: gr-qc
 Abstract: Template-based searches for gravitational waves are often limited by the computational cost associated with searching large parameter spaces. The study of efficient template banks, in the sense of using the smallest number of templates, is therefore of great practical interest. The traditional approach to template-bank construction requires every point in parameter space to be covered by at least one template, which rapidly becomes inefficient at higher dimensions. Here we study an alternative approach, where any point in parameter space is covered only with a given probability eta<1. We find that by giving up complete coverage in this way, large reductions in the number of templates are possible, especially at higher dimensions. The prime examples studied here are random template banks in which templates are placed randomly with uniform probability over the parameter space. In addition to its obvious simplicity, this method turns out to be surprisingly efficient. We analyze the statistical properties of such random template banks, and compare their efficiency to traditional lattice coverings. We further study relaxed lattice coverings (using [openface Z]n and An* lattices), which similarly cover any signal location only with probability eta. The relaxed An* lattice is found to yield the most efficient template banks at low dimensions (n<~10), while random template banks increasingly outperform any other method at higher dimensions.

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 Dates: 2009-05-13
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevD.79.104017
eDoc: 379286
arXiv: 0809.5223
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Title: Physical Review D.
  Alternative Title : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : Published for the American Physical Society by the American Institute of Physics
Pages: - Volume / Issue: 79 (10) Sequence Number: 104017 Start / End Page: - Identifier: Other: 111088197762258
ISSN: 0556-2821