The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs

By S. Sachdev, S. Caudill, H. Fong, R. K. Lo, C. Messick, D. Mukherjee, R. Magee, L. Tsukada, Kent Blackburn, Patrick R. Brady and 19 more. 2019

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After their successful first observing run (September 12, 2015 - January 12, 2016), the Advanced LIGO detectors were upgraded to increase their sensitivity for the second observing run (November 30, 2016 - August 26, 2017). The Advanced Virgo detector joined the second observing run on August 1, 2017. We discuss the updates that happened during this period in the GstLAL-based inspiral pipeline, which is used to detect gravitational waves from the coalescence of compact binaries both in low latency and an offline configuration. These updates include deployment of a zero-latency whitening filter to reduce the over-all latency of the pipeline by up to 32 seconds, incorporation of the Virgo data stream in the analysis, introduction of a single-detector search to analyze data from the periods when only one of the detectors is running, addition of new parameters to the likelihood ratio ranking statistic, increase in the parameter space of the search, and introduction of a template mass-dependent glitch-excision thresholding method.

Subfields: Astronomy and Astrophysics, Computational Mechanics, Oceanography

View Paper: https://www.semanticscholar.org/paper/33b6946dbc15091442d9518f88604cf209c25954

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Citations in the corpus

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): “III, we used the same methods and data products as reported for GWTC-2 [8].”
GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs (2018, methodology): “A largely independent matched-filter pipeline based on the GstLAL library [9,10] (henceforth GstLAL) also performs a matched-filter search for CBC signals.”
Tests of general relativity with the binary black hole signals from the LIGO-Virgo catalog GWTC-1 (2019, methodology): “Second, we choose to produce combined constraints only from events that were found in both modeled searches (PYCBC [45–47] and GSTLAL [48,49]) with a FAR of at most one per one thousand years.”
GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo During the First Half of the Third Observing Run (2020, methodology): “[93] P. Godwin et al., Incorporation of Statistical Data Quality Information into the GstLAL Search Analysis, Technical Report No.”