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  Reconstructing the sky location of gravitational-wave detected compact binary systems: methodology for testing and comparison

Sidery, T., Aylott, B., Christensen, N., Farr, B., Farr, W., Feroz, F., et al. (2014). Reconstructing the sky location of gravitational-wave detected compact binary systems: methodology for testing and comparison. Physical Review D, 89: 084060. doi:10.1103/PhysRevD.89.084060.

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Sidery, Trevor, Autor
Aylott, Ben, Autor
Christensen, Nelson, Autor
Farr, Ben, Autor
Farr, Will, Autor
Feroz, Farhan, Autor
Gair, Jonathan, Autor
Grover, Katherine, Autor
Graff, Philip, Autor
Hanna, Chad, Autor
Kalogera, Vassiliki, Autor
Mandel, Ilya, Autor
O'Shaughnessy, Richard, Autor
Pitkin, Matthew, Autor
Price, Larry, Autor
Raymond, Vivien, Autor
Roever, Christian1, Autor           
Singer, Leo, Autor
Van der Sluys, Marc, Autor
Smith, Rory J. E., Autor
Vecchio, Alberto, AutorVeitch, John, AutorVitale, Salvatore, Autor mehr..
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Schlagwörter: Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Astrophysics, Solar and Stellar Astrophysics, astro-ph.SR
 Zusammenfassung: The problem of reconstructing the sky position of compact binary coalescences detected via gravitational waves is a central one for future observations with the ground-based network of gravitational-wave laser interferometers, such as Advanced LIGO and Advanced Virgo. Different techniques for sky localisation have been independently developed. They can be divided in two broad categories: fully coherent Bayesian techniques, which are high-latency and aimed at in-depth studies of all the parameters of a source, including sky position, and "triangulation-based" techniques, which exploit the data products from the search stage of the analysis to provide an almost real-time approximation of the posterior probability density function of the sky location of a detection candidate. These techniques have previously been applied to data collected during the last science runs of gravitational-wave detectors operating in the so-called initial configuration. Here, we develop and analyse methods for assessing the self-consistency of parameter estimation methods and carrying out fair comparisons between different algorithms, addressing issues of efficiency and optimality. These methods are general, and can be applied to parameter estimation problems other than sky localisation. We apply these methods to two existing sky localisation techniques representing the two above-mentioned categories, using a set of simulated inspiral-only signals from compact binary systems with total mass $\le 20\,M_\odot$ and non-spinning components. We compare the relative advantages and costs of the two techniques and show that sky location uncertainties are on average a factor $\approx 20$ smaller for fully coherent techniques than for the specific variant of the "triangulation-based" technique used during the last science runs, at the expense of a factor $\approx 1000$ longer processing time.

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 Datum: 2013-12-202014
 Publikationsstatus: Erschienen
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Titel: Physical Review D
  Andere : Phys. Rev. D.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Lancaster, Pa. : American Physical Society
Seiten: - Band / Heft: 89 Artikelnummer: 084060 Start- / Endseite: - Identifikator: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258