Image Details
GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog
A. G. Abac et al 2025 The Astrophysical Journal Letters 995 .
Caption: Figure 3.
The number of CBC detection candidates with a probability of astrophysical origin greater than or equal to 50% vs. the detector network’s effective surveyed hypervolume for BNS coalescences (R. Abbott et al. 2021b). The BNS effective surveyed hypervolume is a valid proxy for overall sensitivity to CBCs, though its scale is set to the case of canonical BNS signals. The colored bands indicate the different observing runs. The final data sets for O1, O2, O3a, O3b, and O4a consist of 49.0 day, 122.2 day, 149.6 day (177.1 day), 124.6 day (141.9 day) and 126.5 (196.8) days, respectively, with at least two detectors (one detector) observing. The cumulative number of probable candidates is indicated by the solid black line, while the blue line, dark-blue band, and light-blue band are the median, 50% confidence interval, and 90% confidence interval for a Poisson distribution fit to the number of candidates at the end of O4a, respectively.
© 2025. The Author(s). Published by the American Astronomical Society.