Empirically extending the range of validity of parameter-space metrics for all-sky searches for gravitational-wave pulsars

Abstract

All-sky searches for gravitational-wave pulsars are generally limited in sensitivity by the finite availability of computing resources. Semicoherent searches are a common method of maximizing search sensitivity given a fixed computing budget. The work of Wette and Prix [Phys. Rev. D 88, 123005 (2013)] and Wette [Phys. Rev. D 92, 082003 (2015)] developed a semicoherent search method which uses metrics to construct the banks of pulsar signal templates needed to search the parameter space of interest. In this work we extend the range of validity of the parameter-space metrics using an empirically-derived relationship between the resolution (or mismatch) of the template banks and the mismatch of the overall search. This work has important consequences for the optimization of metric-based semicoherent searches at fixed computing cost.

14 pages, 5 figures, 4 tables

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• Empirically estimating the distribution of the loudest candidate from a gravitational-wave search
• Optimising the choice of analysis method for all-sky searches for continuous gravitational waves with Einstein@Home
• Scalable data-analysis framework for long-duration gravitational waves from compact binaries using short Fourier transforms
• Toward a computationally-efficient follow-up pipeline for blind continuous gravitational-wave searches
• One-stop strategy to search for long-duration gravitational-wave signals
• Banks of templates for directed and all-sky narrow-band searches of continuous gravitational waves from spinning neutron stars with several spindowns
• Analysing one- and two-bit data to reduce memory requirements for F-statistic-based gravitational wave searches