χ2 time-frequency discriminator for gravitational wave detection

By B. Allen. 2004

227 citations recorded by the source corpus.

Searches for known waveforms in gravitational wave detector data are often done using matched filtering. When used on real instrumental data, matched filtering often does not perform as well as might be expected, because nonstationary and non-Gaussian detector noise produces large spurious filter outputs (events). This paper describes a {chi}{sup 2} time-frequency test which is one way to discriminate such spurious events from the events that would be produced by genuine signals. The method works well only for broadband signals. The case where the filter-template does not exactly match the signal waveform is also considered, and upper bounds are found for the expected value of {chi}{sup 2}.

Subfields: Artificial Intelligence, Astronomy and Astrophysics, Geophysics

View Paper: https://www.semanticscholar.org/paper/23397717fc34c6c3635eab54a2a955dec19f6594

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Citations in the corpus

The MBTA pipeline for detecting compact binary coalescences in the third LIGO–Virgo observing run (2020, unknown): “31 195010 [29] B. Allen 2005 Phys.”
LIGO: The laser interferometer gravitational-wave observatory (2006, background): “Coincident triggers are subject to additional consistency checks, such as the χ2 [71] and r2 [72] tests.”
Physics, Astrophysics and Cosmology with Gravitational Waves (2009, methodology): “In this section we will further quantify the χ(2) veto [28] by using the scalar product introduced in the context of matched filtering.”
GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run (2021, methodology): “Five pipelines were used in real time to analyze O3 data: a minimally modeled generic transient search (coherent WaveBurst [97–101]), and four matched-filter [51, 52] pipelines (GstLAL [48– 50], MBTA [56], PyCBC [53–55, 102], and SPIIR [103]).”
1-OGC: The First Open Gravitational-wave Catalog of Binary Mergers from Analysis of Public Advanced LIGO Data (2018, methodology): “For every trigger with ρ>5.5 we calculate the signal consistency test, r 2c , introduced in Allen (2005).”
2-OGC: Open Gravitational-wave Catalog of Binary Mergers from Analysis of Public Advanced LIGO and Virgo Data (2019, methodology): “The surviving single-detector candidates are subjected to the signal consistency tests introduced in Allen (2005) and Nitz (2018).”
Implementing a search for aligned-spin neutron star - black hole systems with advanced ground based gravitational wave detectors (2014, methodology): “A widely used signal-based veto is the reduced χ-statistic [27], which computes the partial SNRs ρ` in p frequency bands and combines them as”
Detecting Binary Compact-object Mergers with Gravitational Waves: Understanding and Improving the Sensitivity of the PyCBC Search (2017, methodology): “Also, it may be possible to develop other diagnostics besides the χ2 test (Allen 2005) to distinguish signals from noise transients in single-detector data.”