LIGO-Virgo-KAGRA Adds 161 Gravitational-Wave Detections, Lifting Catalog Total to 390
Updated
Updated · spacedaily.com · Jul 6
LIGO-Virgo-KAGRA Adds 161 Gravitational-Wave Detections, Lifting Catalog Total to 390
1 articles · Updated · spacedaily.com · Jul 6
Summary
GWTC-5.0 logged 161 new gravitational-wave events from April 2024 to January 2025, bringing LIGO-Virgo-KAGRA’s confirmed total since 2015 to 390.
O4b alone drove the jump: the second half of the fourth observing run produced mostly black-hole mergers, and O4 overall now accounts for about 75% of all detections.
GW240615 was localized to just 6 square degrees—the network’s best sky position yet—while GW250114 delivered the strongest signal so far, with a signal-to-noise ratio of 76.9.
Two late-2024 events, GW241011 and GW241110, may involve second-generation black holes inferred from their spins, hinting at repeat mergers in dense stellar clusters.
The larger catalog also improved a gravitational-wave estimate of the Hubble constant by about 25%, though it still has not resolved the broader dispute over cosmic expansion.
Are lunar observatories the key to unlocking gravitational wave frequencies that Earth-based detectors are currently deaf to?
With hundreds of black hole mergers now known, what cosmic secrets are these dead star populations finally revealing to us?
If 'second-generation' black holes exist, are we on the verge of finding a third generation, and what would that imply?
GWTC-5.0: The Most Precise Gravitational-Wave Catalog Yet—Rewriting Black Hole and Cosmological Science
Overview
The release of the GWTC-5.0 catalog by the LIGO–Virgo–KAGRA Collaboration marks a major step forward in gravitational-wave astronomy. Through intense noise-mitigation and advanced data analysis, scientists have detected and extracted gravitational-wave signals with unprecedented clarity. This new catalog features the clearest signal ever observed, GW250114, which enables more precise tests of general relativity and deepens our understanding of black hole origins. These achievements usher in a new era of discovery, driven by improved detector sensitivity and sophisticated methods, and set the stage for future breakthroughs in exploring the universe.