Bayley, J. , Messenger, C. and Woan, G. (2019) Generalized application of the Viterbi algorithm to searches for continuous gravitational-wave signals. Physical Review D, 100(2), 023006. (doi: 10.1103/PhysRevD.100.023006)
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Abstract
All-sky and wide parameter space searches for continuous gravitational waves are generally template-matching schemes which test a bank of signal waveforms against data from a gravitational wave detector. Such searches can offer optimal sensitivity for a given computing cost and signal model, but are highly-tuned to specific signal types and are computationally expensive, even for semicoherent searches. We have developed a search method based on the well-known Viterbi algorithm which is model-agnostic and has a computational cost several orders of magnitude lower than template methods, with a modest reduction in sensitivity. In particular, this method can search for signals which have an unknown frequency evolution. We test the algorithm on three simulated and real data sets: gapless Gaussian noise, Gaussian noise with gaps and real data from the final run of initial LIGO (S6). We show that at 95% efficiency, with a 1% false alarm rate, the algorithm has a depth sensitivity of ∼ 33 , 10 and 13 Hz − 1 / 2 with corresponding SNRs of ∼ 60 , 72 and 74 in these datasets. We discuss the use of this algorithm for detecting a wide range of quasimonochromatic gravitational wave signals and instrumental lines.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Messenger, Dr Christopher and Woan, Professor Graham and Bayley, Mr Joseph |
| Authors: | Bayley, J., Messenger, C., and Woan, G. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 2470-0010 |
| ISSN (Online): | 2470-0029 |
| Published Online: | 17 July 2019 |
| Copyright Holders: | Copyright © 2019 American Physical Society |
| First Published: | First published in Physical Review D 100(2): 023006 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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