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GW240830_211120 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240830_211120

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240830_211120

Both component-mass lower bounds exceed 3 solar masses

Primary mass11.9 M☉

Secondary mass7.8 M☉

ObservedAug 30, 2024

Event identity

Classification and release

ID: gwtc:GW240830_211120
Event name: GW240830_211120
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: Friday, August 30, 2024 at 9:11:20 PM UTC UTC
GPS time: 1,409,087,498.4

Source-frame posterior

Component and remnant masses

Primary mass: 11.9 (-2.3, +3.6) M☉
Secondary mass: 7.8 (-1.7, +1.6) M☉
Remnant mass: 18.9 (-1.6, +2.3) M☉
Effective spin: 0.07
Network SNR: 11.1

Propagation

Distance and statistical context

Luminosity distance: 1,140 (-490, +500) Mpc
Redshift: 0.22
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240830_211120

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

JSON record GWOSC event page