Image Details
GWTC-4.0: Constraints on the Cosmic Expansion Rate and Modified Gravitational-wave Propagation
A. G. Abac et al 2026 The Astrophysical Journal Letters 1007 .
Caption: Figure 2.
Cumulative distribution of the size of the 90% CR of the sky localization of CBC candidates observed during O1+O2+O3+O4a in orange (142 total events including GW170817) and O4a-only in blue (76 events). It can be seen that the typical sky localization of O4a events was larger than that of O1–O3 events.
© 2026. The Author(s). Published by the American Astronomical Society.