Extending the PyCBC search for gravitational waves from compact binary mergers to a global network

Gareth S. Davies, Thomas Dent, Márton Tápai, Ian Harry, Connor McIsaac, Alexander H. Nitz

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The worldwide advanced gravitational-wave (GW) detector network has so far primarily consisted of the two Advanced LIGO observatories at Hanford and Livingston, with Advanced Virgo joining the 2016-7 O2 observation run at a relatively late stage. However Virgo has been observing alongside the LIGO detectors since the start of the O3 run; in the near future, the KAGRA detector will join the global network and a further LIGO detector in India is under construction. Gravitational-wave search methods would therefore benefit from the ability to analyse data from an arbitrary network of detectors. In this paper, we extend the PyCBC offline compact binary coalescence (CBC) search analysis to three or more detectors, and describe resulting updates to the coincident search and event ranking statistic. For a three-detector network, our improved multi-detector search finds 23% more simulated signals at fixed false alarm rate in idealized colored Gaussian noise, and up to 40% more in real data, compared to the two-detector analysis previously used during O2.

Original languageEnglish
Article number022004
Number of pages15
JournalPhysical Review D
Issue number2
Early online date6 Jul 2020
Publication statusPublished - 15 Jul 2020




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