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Performance of the low-latency GstLAL inspiral search towards LIGO, Virgo, and KAGRA's fourth observing run

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arxiv 2305.05625 v2 pith:2FF2BL6M submitted 2023-05-09 gr-qc astro-ph.IM

classification gr-qcastro-ph.IM
keywords searchgstlalligoperformancedatagravitationalvirgochallenge
verification ladder T0 review T1 audit T2 compute T3 formal
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GstLAL is a stream-based matched-filtering search pipeline aiming at the prompt discovery of gravitational waves from compact binary coalescences such as the mergers of black holes and neutron stars. Over the past three observation runs by the LIGO, Virgo, and KAGRA (LVK) collaboration, the GstLAL search pipeline has participated in several tens of gravitational wave discoveries. The fourth observing run (O4) is set to begin in May 2023 and is expected to see the discovery of many new and interesting gravitational wave signals which will inform our understanding of astrophysics and cosmology. We describe the current configuration of the GstLAL low-latency search and show its readiness for the upcoming observation run by presenting its performance on a mock data challenge. The mock data challenge includes 40 days of LIGO Hanford, LIGO Livingston, and Virgo strain data along with an injection campaign in order to fully characterize the performance of the search. We find an improved performance in terms of detection rate and significance estimation as compared to that observed in the O3 online analysis. The improvements are attributed to several incremental advances in the likelihood ratio ranking statistic computation and the method of background estimation.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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    A quantile regression neural network produces real-time credible intervals for chirp mass, mass ratio, and total mass of compact binary mergers, with coverage mostly above 90%, and these intervals serve as priors that...

  4. PINCH: Pipeline-Informed Noise Characterization in LIGO's Third Observing Run

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    PINCH uses support vector machines trained on clean GstLAL triggers to identify glitch-induced triggers, revealing class-specific patterns in how transient noise contaminates LIGO's third observing run.

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    astro-ph.IM 2025-05 conditional novelty 5.0 of 10

    Aframe, a neural-network gravitational-wave search, recovers 38 previously known binary black hole mergers from O3 data and finds no new candidates, showing ML pipelines are viable but not yet superior to matched filtering.

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    astro-ph.HE 2025-07 conditional novelty 4.0 of 10

    An all-sky search of O4a LIGO data finds no new gravitational-wave bursts and improves burst sensitivity and rate limits by factors of 2 to 10 over the previous run.

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