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  Parameter-space metric of semicoherent searches for continuous gravitational waves

Pletsch, H. J. (2010). Parameter-space metric of semicoherent searches for continuous gravitational waves. Physical Review D., 82: 042002. doi:10.1103/PhysRevD.82.042002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-69DC-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-69DE-2
Genre: Journal Article

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Pletsch, H. J.1, Author              
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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 Abstract: Continuous gravitational-wave (CW) signals such as emitted by spinning neutron stars are an important target class for current detectors. However, the enormous computational demand prohibits fully coherent broadband all-sky searches for prior unknown CW sources over wide ranges of parameter space and for yearlong observation times. More efficient hierarchical “semicoherent” search strategies divide the data into segments much shorter than one year, which are analyzed coherently; then detection statistics from different segments are combined incoherently. To optimally perform the incoherent combination, understanding of the underlying parameter-space structure is requisite. This problem is addressed here by using new coordinates on the parameter space, which yield the first analytical parameter-space metric for the incoherent combination step. This semicoherent metric applies to broadband all-sky surveys (also embedding directed searches at fixed sky position) for isolated CW sources. Furthermore, the additional metric resolution attained through the combination of segments is studied. From the search parameters (sky position, frequency, and frequency derivatives), solely the metric resolution in the frequency derivatives is found to significantly increase with the number of segments.

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 Dates: 2010-03-242010
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: arXiv: 1005.0395
DOI: 10.1103/PhysRevD.82.042002
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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: 82 Sequence Number: 042002 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: /journals/resource/111088197762258