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  Search method for long-duration gravitational-wave transients from neutron stars

Prix, R., Giampanis, S., & Messenger, C. (2011). Search method for long-duration gravitational-wave transients from neutron stars. Physical Review D, 84(2): 023007. doi:10.1103/PhysRevD.84.023007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-06C4-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-06C5-2
Genre: Journal Article

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 Creators:
Prix, Reinhard1, Author              
Giampanis, Stefanos1, Author              
Messenger, Christopher1, Author              
Affiliations:
1Observational 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
 Abstract: We introduce a search method for a new class of gravitational-wave signals, namely long-duration O(hours - weeks) transients from spinning neutron stars. We discuss the astrophysical motivation from glitch relaxation models and we derive a rough estimate for the maximal expected signal strength based on the superfluid excess rotational energy. The transient signal model considered here extends the traditional class of infinite-duration continuous-wave signals by a finite start-time and duration. We derive a multi-detector Bayes factor for these signals in Gaussian noise using $\F$-statistic amplitude priors, which simplifies the detection statistic and allows for an efficient implementation. We consider both a fully coherent statistic, which is computationally limited to directed searches for known pulsars, and a cheaper semi-coherent variant, suitable for wide parameter-space searches for transients from unknown neutron stars. We have tested our method by Monte-Carlo simulation, and we find that it outperforms orthodox maximum-likelihood approaches both in sensitivity and in parameter-estimation quality.

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 Dates: 2011-04-092011
 Publication Status: Published in print
 Pages: 20 pages, 9 figures; submitted to PRD
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1104.1704
DOI: 10.1103/PhysRevD.84.023007
URI: http://arxiv.org/abs/1104.1704
 Degree: -

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Title: Physical Review D
  Other : 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: 84 (2) Sequence Number: 023007 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258