Bayesian modeling of source confusion in LISA data

Details Bayesian modeling of source confusion in LISA data Bayesian modeling of source confusion in LISA data

2005-06-09

arxiv.org/abs/gr-qc/0506055v1

Phys.Rev. D72 (2005) 022001

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

29 pages, 8 figures

Scientific paper

10.1103/PhysRevD.72.022001

One of the greatest data analysis challenges for the Laser Interferometer Space Antenna (LISA) is the need to account for a large number of gravitational wave signals from compact binary systems expected to be present in the data. We introduce the basis of a Bayesian method that we believe can address this challenge, and demonstrate its effectiveness on a simplified problem involving one hundred synthetic sinusoidal signals in noise. We use a reversible jump Markov chain Monte Carlo technique to infer simultaneously the number of signals present, the parameters of each identified signal, and the noise level. Our approach therefore tackles the detection and parameter estimation problems simultaneously, without the need to evaluate formal model selection criteria, such as the Akaike Information Criterion or explicit Bayes factors. The method does not require a stopping criterion to determine the number of signals, and produces results which compare very favorably with classical spectral techniques.

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