Image Details
Caption: Figure 1.
BBH candidates (defined as events with both component masses ≳ 3 M⊙; olive) and likely BH–neutron star systems (secondary mass less that 3 M⊙; gray) from the fifth GW Transient Catalog (GWTC-5; LIGO-Virgo-KAGRA Collaboration 2026). For comparison we also show the binary neutron star merger GW170817 (orange), and mark BBHs with candidate GRB associations which have emerged in every LVK observing run (observing run 1 (O1) to O4; Sun crosses), including GW241125 analyzed here.
© 2026. The Author(s). Published by the American Astronomical Society.