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GW240520_213616 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240520_213616

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240520_213616

Both component-mass lower bounds exceed 3 solar masses

Primary mass11.4 M☉

Secondary mass8 M☉

ObservedMay 20, 2024

Event identity

Classification and release

ID: gwtc:GW240520_213616
Event name: GW240520_213616
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-5.0
Preferred event version: v1
Observed at: Monday, May 20, 2024 at 9:36:17 PM UTC UTC
GPS time: 1,400,276,195

Source-frame posterior

Component and remnant masses

Primary mass: 11.4 (-1.9, +3.6) M☉
Secondary mass: 8 (-1.8, +1.5) M☉
Remnant mass: 18.7 (-1.4, +2.1) M☉
Effective spin: Not reported by GWOSC
Network SNR: 11.9

Propagation

Distance and statistical context

Luminosity distance: 1,400 (-500, +530) Mpc
Redshift: 0.27
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240520_213616

Last synchronized 9/12/2026, 3:20:17 AM UTC.

JSON record GWOSC event page