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GW250109_074552 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW250109_074552

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW250109_074552

Both component-mass lower bounds exceed 3 solar masses

Primary mass39 M☉

Secondary mass30.2 M☉

ObservedJan 9, 2025

Event identity

Classification and release

ID: gwtc:GW250109_074552
Event name: GW250109_074552
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 9, 2025 at 7:45:52 AM UTC UTC
GPS time: 1,420,443,970.4

Source-frame posterior

Component and remnant masses

Primary mass: 39 (-6.3, +8.3) M☉
Secondary mass: 30.2 (-7.2, +6.8) M☉
Remnant mass: 65.9 (-8.1, +9.8) M☉
Effective spin: 0.07
Network SNR: 10.7

Propagation

Distance and statistical context

Luminosity distance: 2,300 (-1,100, +1,400) Mpc
Redshift: 0.41
Astrophysical probability: 0.95
False-alarm rate: 0.42

Provenance

Official source record

GWOSC · GWTC-5.0

GW250109_074552

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

JSON record GWOSC event page