Mock LISA data challenge for the galactic white dwarf binaries

Details Mock LISA data challenge for the galactic white dwarf binaries Mock LISA data challenge for the galactic white dwarf binaries

2009-11-16

arxiv.org/abs/0911.3020v2

Phys.Rev.D81:063008,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

38 pages, 13 figures; version accepted in PRD with section VI extended

Scientific paper

10.1103/PhysRevD.81.063008

We present data analysis methods used in detection and the estimation of parameters of gravitational wave signals from the white dwarf binaries in the mock LISA data challenge. Our main focus is on the analysis of challenge 3.1, where the gravitational wave signals from more than 50 mln. Galactic binaries were added to the simulated Gaussian instrumental noise. Majority of the signals at low frequencies are not resolved individually. The confusion between the signals is strongly reduced at frequencies above 5 mHz. Our basic data analysis procedure is the maximum likelihood detection method. We filter the data through the template bank at the first step of the search, then we refine parameters using the Nelder-Mead algorithm, we remove the strongest signal found and we repeat the procedure. We detect reliably and estimate parameters accurately of more than ten thousand signals from white dwarf binaries.

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