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GW240920_073424 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240920_073424

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240920_073424

Both component-mass lower bounds exceed 3 solar masses

Primary mass24.7 M☉

Secondary mass13.4 M☉

ObservedSep 20, 2024

Event identity

Classification and release

ID: gwtc:GW240920_073424
Event name: GW240920_073424
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: Friday, September 20, 2024 at 7:34:24 AM UTC UTC
GPS time: 1,410,852,882.5

Source-frame posterior

Component and remnant masses

Primary mass: 24.7 (-5.6, +7.6) M☉
Secondary mass: 13.4 (-3.2, +3.3) M☉
Remnant mass: 36.7 (-3.8, +5.6) M☉
Effective spin: -0.09
Network SNR: 14

Propagation

Distance and statistical context

Luminosity distance: 1,440 (-550, +620) Mpc
Redshift: 0.27
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240920_073424

Last synchronized 9/12/2026, 1:40:20 AM UTC.

JSON record GWOSC event page