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GW250116_015318 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW250116_015318

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW250116_015318

Both component-mass lower bounds exceed 3 solar masses

Primary mass34.2 M☉

Secondary mass21.3 M☉

ObservedJan 16, 2025

Event identity

Classification and release

ID: gwtc:GW250116_015318
Event name: GW250116_015318
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: Thursday, January 16, 2025 at 1:53:18 AM UTC UTC
GPS time: 1,421,027,616.4

Source-frame posterior

Component and remnant masses

Primary mass: 34.2 (-9.3, +14.5) M☉
Secondary mass: 21.3 (-8.3, +8.8) M☉
Remnant mass: 53 (-11, +15) M☉
Effective spin: 0.15
Network SNR: 8

Propagation

Distance and statistical context

Luminosity distance: 5,200 (-2,500, +3,900) Mpc
Redshift: 0.8
Astrophysical probability: 0.99
False-alarm rate: 0.12

Provenance

Official source record

GWOSC · GWTC-5.0

GW250116_015318

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

JSON record GWOSC event page