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Fully coherent follow-up of continuous gravitational-wave candidates

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons40537

Shaltev,  Miroslav
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons40534

Prix,  Reinhard
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Volltexte (frei zugänglich)

1303.2471
(Preprint), 2MB

PRD87_084057.pdf
(beliebiger Volltext), 2MB

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Zitation

Shaltev, M., & Prix, R. (2013). Fully coherent follow-up of continuous gravitational-wave candidates. Physical Review D, 87: 084057. doi:10.1103/PhysRevD.87.084057.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-FD0F-3
Zusammenfassung
The search for continuous gravitational waves from unknown isolated sources is computationally limited due to the enormous parameter space that needs to be covered and the weakness of the expected signals. Therefore semi-coherent search strategies have been developed and applied in distributed computing environments such as Einstein@Home, in order to narrow down the parameter space and identify interesting candidates. However, in order to optimally confirm or dismiss a candidate as a possible gravitational-wave signal, a fully-coherent follow-up using all the available data is required. We present a general method and implementation of a direct (2-stage) transition to a fully-coherent follow-up on semi-coherent candidates. This method is based on a grid-less Mesh Adaptive Direct Search (MADS) algorithm using the F-statistic. We demonstrate the detection power and computing cost of this follow-up procedure using extensive Monte-Carlo simulations on (simulated) semi-coherent candidates from a directed as well as from an all-sky search setup.