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GW231118_005626 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231118_005626

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231118_005626

Both component-mass lower bounds exceed 3 solar masses

Primary mass20 M☉

Secondary mass10.8 M☉

ObservedNov 18, 2023

Event identity

Classification and release

ID: gwtc:GW231118_005626
Event name: GW231118_005626
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 12:56:26 AM UTC UTC
GPS time: 1,384,304,204.8

Source-frame posterior

Component and remnant masses

Primary mass: 20 (-5, +7.5) M☉
Secondary mass: 10.8 (-2.4, +3.4) M☉
Remnant mass: 29.4 (-3.6, +6) M☉
Effective spin: 0.38
Network SNR: 10.7

Propagation

Distance and statistical context

Luminosity distance: 2,190 (-970, +930) Mpc
Redshift: 0.39
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW231118_005626

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

JSON record GWOSC event page