Likelihood smoothing using gravitational wave surrogate models

Robert H. Cole, Jonathan R. Gair

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Likelihood surfaces in the parameter space of gravitational wave signals can contain many secondary maxima, which can prevent search algorithms from finding the global peak and correctly mapping the distribution. Traditional schemes to mitigate this problem maintain the number of secondary maxima and thus retain the possibility that the global maximum will remain undiscovered. By contrast, the recently proposed technique of likelihood transform can modify the structure of the likelihood surface to reduce its complexity. We present a practical method to carry out a likelihood transform using a Gaussian smoothing kernel, utilising gravitational wave surrogate models to perform the smoothing operation analytically. We demonstrate the approach with Newtonian and post-Newtonian waveform models for an inspiralling circular compact binary.
Original languageEnglish
Article number124043
JournalPhysical Review D, particles, fields, gravitation, and cosmology
Volume90
Issue number12
DOIs
Publication statusPublished - 15 Dec 2014

Keywords / Materials (for Non-textual outputs)

  • gr-qc

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