A targeted spectral interpolation algorithm for the detection of continuous gravitational waves

Davies, G. S., Pitkin, M. and Woan, G. (2016) A targeted spectral interpolation algorithm for the detection of continuous gravitational waves. Classical and Quantum Gravity, 34(1), 015010. (doi: 10.1088/1361-6382/34/1/015010)

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Abstract

We present an improved method of targeting continuous gravitationalwave signals in data from the LIGO and Virgo detectors with a higher efficiency than the time-domain Bayesian pipeline used in many previous searches. Our spectral interpolation algorithm, SplInter, removes the intrinsic phase evolution of the signal from source rotation and relative detector motion. We do this in the frequency domain and generate a time series containing only variations in the signal due to the antenna pattern. Although less flexible than the classic heterodyne approach, SplInter allows for rapid analysis of putative signals from isolated (and some binary) pulsars, and efficient follow-up searches for candidate signals generated by other search methods. The computational saving over the heterodyne approach can be many orders of magnitude, up to a factor of around fifty thousand in some cases, with a minimal impact on overall sensitivity for most targets.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Woan, Professor Graham and Pitkin, Dr Matthew
Authors: Davies, G. S., Pitkin, M., and Woan, G.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics
ISSN:0264-9381
ISSN (Online):1361-6382
Copyright Holders:Copyright © 2016 IOP Publishing Ltd
First Published:First published in Classical and Quantum Gravity 34(1): 015010
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technologies Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY