Dynamic normalization for compact binary coalescence searches in non-stationary noise

Simone Mozzon, Laura Nuttall, Andrew Lundgren, Thomas Dent, Sumit Kumar, Alex Nitz

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The output of gravitational-wave interferometers, such as LIGO and Virgo, can be highly non-stationary. Broadband detector noise can affect the detector sensitivity on the order of tens of seconds. Gravitational-wave transient searches, such as those for colliding black holes, estimate this noise in order to identify gravitational-wave events. During times of non-stationarity we see a higher rate of false events being reported. To accurately separate signal from noise, it is imperative to incorporate the changing detector state into gravitational-wave searches. We develop a new statistic which estimates the variation of the interferometric detector noise. We use this statistic to re-rank candidate events identified during LIGO-Virgo's second observing run by the PyCBC search pipeline. This results in a 5% improvement in the sensitivity volume for low mass binaries, particularly binary neutron stars mergers.
Original languageEnglish
Article number215014
Number of pages11
JournalClassical and Quantum Gravity
Issue number21
Early online date5 Aug 2020
Publication statusPublished - 9 Oct 2020


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