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

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