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GW250118_023225 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW250118_023225

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW250118_023225

Both component-mass lower bounds exceed 3 solar masses

Primary mass44 M☉

Secondary mass31 M☉

ObservedJan 18, 2025

Event identity

Classification and release

ID: gwtc:GW250118_023225
Event name: GW250118_023225
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: Saturday, January 18, 2025 at 2:32:25 AM UTC UTC
GPS time: 1,421,202,763.9

Source-frame posterior

Component and remnant masses

Primary mass: 44 (-10, +15) M☉
Secondary mass: 31 (-11, +11) M☉
Remnant mass: 71 (-13, +19) M☉
Effective spin: 0.04
Network SNR: 9

Propagation

Distance and statistical context

Luminosity distance: 5,800 (-2,900, +3,800) Mpc
Redshift: 0.88
Astrophysical probability: 0.99
False-alarm rate: 0.0035

Provenance

Official source record

GWOSC · GWTC-5.0

GW250118_023225

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

JSON record GWOSC event page