GW231109 235456: A Sub-threshold Binary Neutron Star Merger in the LIGO-Virgo-KAGRA O4a Observing Run?

arXiv:2509.09741 · astro-ph.HE, gr-qc · Submitted 2025-09-11 · Read on arXiv

astro-ph.HE, gr-qc

Submitted: 2025-09-11

Updated: 2026-09-21

Comments: 18 pages, 4 figures, 4 table

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abundance — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes
• Consistency — 1× in this paper · explained in 3 episodes
• Gravitational Wave Transient Catalog — 1× in this paper
• Laser Interferometer Gravitational-Wave Observatory — 1× in this paper
• Observational Selection Effects — 1× in this paper · explained in 2 episodes
• Resource Constraints — 1× in this paper · explained in 3 episodes
• Signal-to-noise ratio (SNR) — 1× in this paper · explained in 2 episodes
• United States National Science Foundation — 1× in this paper

Sources

• GWTC-4.0: Updating the Gravitational-Wave Transient Catalog with Observations from the First Part of the Fourth LIGO-Virgo-KAGRA Observing Run
• GWTC-4.0: Methods for Identifying and Characterizing Gravitational-wave Transients
• GWTC-4.0: Population Properties of Merging Compact Binaries
• GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog
• New Methods for Offline GstLAL Analyses
• How Many Times Should We Matched Filter Gravitational Wave Data? A Comparison of GstLAL's Online and Offline Performance
• When to Point Your Telescopes: Gravitational Wave Trigger Classification for Real-Time Multi-Messenger Followup Observations
• The GstLAL Search Analysis Methods for Compact Binary Mergers in Advanced LIGO's Second and Advanced Virgo's First Observing Runs

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