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GW231118_090602 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231118_090602

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231118_090602

Both component-mass lower bounds exceed 3 solar masses

Primary mass12.9 M☉

Secondary mass7.4 M☉

ObservedNov 18, 2023

Event identity

Classification and release

ID: gwtc:GW231118_090602
Event name: GW231118_090602
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 9:06:02 AM UTC UTC
GPS time: 1,384,333,580

Source-frame posterior

Component and remnant masses

Primary mass: 12.9 (-3.1, +12.4) M☉
Secondary mass: 7.4 (-3.2, +2.1) M☉
Remnant mass: 19.6 (-2.2, +9.4) M☉
Effective spin: 0.08
Network SNR: 11

Propagation

Distance and statistical context

Luminosity distance: 1,360 (-620, +550) Mpc
Redshift: 0.26
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW231118_090602

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

JSON record GWOSC event page