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GW230709_122727 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230709_122727

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230709_122727

Both component-mass lower bounds exceed 3 solar masses

Primary mass45 M☉

Secondary mass30 M☉

ObservedJul 9, 2023

Event identity

Classification and release

ID: gwtc:GW230709_122727
Event name: GW230709_122727
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: Sunday, July 9, 2023 at 12:27:27 PM UTC UTC
GPS time: 1,372,940,865.2

Source-frame posterior

Component and remnant masses

Primary mass: 45 (-11, +16) M☉
Secondary mass: 30 (-13, +12) M☉
Remnant mass: 71 (-13, +19) M☉
Effective spin: 0.08
Network SNR: 10.2

Propagation

Distance and statistical context

Luminosity distance: 4,700 (-2,500, +3,500) Mpc
Redshift: 0.74
Astrophysical probability: 0.99
False-alarm rate: 0.001

Provenance

Official source record

GWOSC · GWTC-4.1

GW230709_122727

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

JSON record GWOSC event page