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  Driving unmodeled gravitational-wave transient searches using astrophysical information

Bacon, P., Gayathri, V., Chassande-Mottin, E., Pai, A., Salemi, F., & Vedovato, G. (2018). Driving unmodeled gravitational-wave transient searches using astrophysical information. Physical Review D, 98: 024028. doi:10.1103/PhysRevD.98.024028.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-5D9E-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-E8FC-C
Genre: Journal Article

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Bacon, P., Author
Gayathri, V., Author
Chassande-Mottin, E., Author
Pai, A., Author
Salemi, F.1, Author              
Vedovato, G., Author
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
 Abstract: Transient gravitational-wave searches can be divided into two main families of approaches: modelled and unmodelled searches, based on matched filtering techniques and time-frequency excess power identification respectively. The former, mostly applied in the context of compact binary searches, relies on the precise knowledge of the expected gravitational-wave phase evolution. This information is not always available at the required accuracy for all plausible astrophysical scenarios, e.g., in presence of orbital precession, or eccentricity. The other search approach imposes little priors on the targetted signal. We propose an intermediate route based on a modification of unmodelled search methods in which time-frequency pattern matching is constrained by astrophysical waveform models (but not requiring accurate prediction for the waveform phase evolution). The set of astrophysically motivated patterns is conveniently encapsulated in a graph, that encodes the time-frequency pixels and their co-occurrence. This allows the use of efficient graph-based optimization techniques to perform the pattern search in the data. We show in the example of black-hole binary searches that such an approach leads to an averaged increase in the distance reach (+7-8\%) for this specific source over standard unmodelled searches.

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 Dates: 2018-05-102018-05-122018
 Publication Status: Published in print
 Pages: 10 pages, 10 figures, 1 table. To be submitted to Physical Review D, approved by LIGO-Virgo internal reviewer. DCC LIGO number LIGO-P1800100
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 Rev. Method: -
 Identifiers: arXiv: 1805.04023
URI: http://arxiv.org/abs/1805.04023
DOI: 10.1103/PhysRevD.98.024028
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 98 Sequence Number: 024028 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258