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GW231118_071402 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231118_071402

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231118_071402

Both component-mass lower bounds exceed 3 solar masses

Primary mass43 M☉

Secondary mass29 M☉

ObservedNov 18, 2023

Event identity

Classification and release

ID: gwtc:GW231118_071402
Event name: GW231118_071402
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-4.1
Preferred event version: v2
Observed at: Saturday, November 18, 2023 at 7:14:02 AM UTC UTC
GPS time: 1,384,326,860.2

Source-frame posterior

Component and remnant masses

Primary mass: 43 (-10, +15) M☉
Secondary mass: 29 (-10, +11) M☉
Remnant mass: 69 (-13, +17) M☉
Effective spin: 0.12
Network SNR: 9.2

Propagation

Distance and statistical context

Luminosity distance: 4,300 (-2,300, +3,600) Mpc
Redshift: 0.69
Astrophysical probability: 0.99
False-alarm rate: 0.0002

Provenance

Official source record

GWOSC · GWTC-4.1

GW231118_071402

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

JSON record GWOSC event page