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  An improved pipeline to search for gravitational waves from compact binary coalescence

Usman, S. A., Kehl, M. S., Nitz, A. H., Harry, I., Brown, D. A., Capano, C. D., et al. (2016). An improved pipeline to search for gravitational waves from compact binary coalescence. Classical and quantum gravity, 33: 215004, pp. 21. doi:10.1088/0264-9381/33/21/215004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-1830-E Version Permalink: http://hdl.handle.net/21.11116/0000-0002-FA98-9
Genre: Journal Article

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 Creators:
Usman, Samantha A., Author
Kehl, Marcel S., Author
Nitz, Alexander H., Author
Harry, Ian1, Author              
Brown, Duncan A., Author
Capano, Collin D., Author
Dent, Thomas2, Author              
Fairhurst, Stephen, Author
Pfeiffer, Harald P., Author
Biwer, Christopher M., Author
Dal Canton, Tito2, Author
Keppel, Drew2, Author              
Saulson, Peter R., Author
West, Matthew, Author
Willis, Joshua L.2, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: The second generation of ground-based gravitational-wave detectors will begin taking data in September 2015. Sensitive and computationally-efficient data analysis methods will be required to maximize what we learn from their observations. We describe improvements made to the offline analysis pipeline searching for gravitational waves from stellar-mass compact binary coalescences, and assess how these improvements affect search sensitivity. Starting with the two-stage ihope pipeline used in S5, S6 and VSR1-3 and using two weeks of S6/VSR3 data as test periods, we first demonstrate a pipeline with a simpler workflow. This single-stage pipeline performs matched filtering and coincidence testing only once. This simplification allows us to reach much lower false-alarm rates for loud candidate events. We then describe an optimized chi-squared test which minimizes computational cost. Next, we compare methods of generating template banks, demonstrating that a fixed bank may be used for extended stretches of time. Fixing the bank reduces the cost and complexity, compared to the previous method of regenerating a template bank every 2048 s of analyzed data. Creating a fixed bank shared by all detectors also allows us to apply a more stringent coincidence test, whose performance we quantify. With these improvements, we find a 10% increase in sensitive volume with a negligible change in computational cost.

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 Dates: 2015-08-102016
 Publication Status: Published in print
 Pages: 27 pages, 13 figures, submitted to Classical and Quantum Gravity
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1508.02357
URI: http://arxiv.org/abs/1508.02357
DOI: 10.1088/0264-9381/33/21/215004
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Title: Classical and quantum gravity
Source Genre: Journal
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Publ. Info: Bristol, U.K. : Institute of Physics
Pages: - Volume / Issue: 33 Sequence Number: 215004 Start / End Page: 21 Identifier: ISSN: 0264-9381
CoNE: /journals/resource/954925513480_1