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GW231223_032836 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231223_032836

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231223_032836

Both component-mass lower bounds exceed 3 solar masses

Primary mass46 M☉

Secondary mass31 M☉

ObservedDec 23, 2023

Event identity

Classification and release

ID: gwtc:GW231223_032836
Event name: GW231223_032836
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, December 23, 2023 at 3:28:36 AM UTC UTC
GPS time: 1,387,337,334.1

Source-frame posterior

Component and remnant masses

Primary mass: 46 (-11, +16) M☉
Secondary mass: 31 (-14, +12) M☉
Remnant mass: 73 (-13, +17) M☉
Effective spin: -0.16
Network SNR: 10.2

Propagation

Distance and statistical context

Luminosity distance: 4,200 (-2,200, +3,100) Mpc
Redshift: 0.67
Astrophysical probability: 0.99
False-alarm rate: 0.0004

Provenance

Official source record

GWOSC · GWTC-4.1

GW231223_032836

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

JSON record GWOSC event page