Compact Binary Coalescence Sensitivity Estimates with Injection Campaigns during the LIGO-Virgo-KAGRA Collaborations' Fourth Observing Run

2025/08/14 by Essick, Reed, Coughlin, Michael W., Zevin, Michael +21 · 18 citations
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)

paper · doi:10.48550/arxiv.2508.10638

Abstract

We describe the effort to characterize gravitational-wave searches and detector sensitivity to different types of compact binary coalescences during the LIGO-Virgo-KAGRA Collaborations' fourth observing run. We discuss the design requirements and example use cases for this data product, constructed from > 4.33×10⁸ injections during O4a alone. We also identify subtle effects with high confidence, like diurnal duty cycles within detectors. This paper accompanies a public data release of the curated injection set, and the appendixes give detailed examples of how to use the publicly available data.

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• The bound orbits and gravitational waveforms of timelike particles around renormalization group improved Kerr black holes
• Gravitational-wave constraints on the pair-instability mass gap and nuclear burning in massive stars
• Evidence of the pair instability gap in the distribution of black hole masses
• Do both black holes spin in merging binaries? Evidence from GWTC-4 and astrophysical implications
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