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Simple parameter estimation using observable features of gravitational-wave signals

Fairhurst, Stephen ORCID:, Hoy, Charlie, Green, Rhys, Mills, Camero and Usman, Samantha A. 2023. Simple parameter estimation using observable features of gravitational-wave signals. Physical Review D (particles, fields, gravitation, and cosmology) 108 (8) , 082006. 10.1103/PhysRevD.108.082006

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Using simple, intuitive arguments, we discuss the expected accuracy with which astrophysical parameters can be extracted from an observed gravitational wave signal. The observation of a chirplike signal in the data allows for measurement of the component masses and aligned spins, while measurement in three or more detectors enables good localization. The ability to measure additional features in the observed signal—the existence or absence of power in (i) the second gravitational wave polarization, (ii) higher gravitational wave multipoles or (iii) spin-induced orbital precession—provide new information which can be used to significantly improve the accuracy of parameter measurement. We introduce the simple-pe algorithm which uses these methods to generate rapid parameter estimation results for binary mergers. We present results from a set of simulations, to illustrate the method, and compare results from simple-pe with measurements from full parameter estimation routines. The simple-pe routine is able to provide initial parameter estimates in a matter of CPU minutes, which could be used in real-time alerts and also as input to significantly accelerate detailed parameter estimation routines.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Advanced Research Computing @ Cardiff (ARCCA)
Physics and Astronomy
Publisher: American Physical Society
ISSN: 2470-0010
Date of First Compliant Deposit: 19 December 2023
Date of Acceptance: 16 August 2023
Last Modified: 10 Jun 2024 09:40

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