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GW240908_082628 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240908_082628

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240908_082628

Both component-mass lower bounds exceed 3 solar masses

Primary mass39.8 M☉

Secondary mass27.7 M☉

ObservedSep 8, 2024

Event identity

Classification and release

ID: gwtc:GW240908_082628
Event name: GW240908_082628
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: Sunday, September 8, 2024 at 8:26:28 AM UTC UTC
GPS time: 1,409,819,206.4

Source-frame posterior

Component and remnant masses

Primary mass: 39.8 (-9.4, +11.8) M☉
Secondary mass: 27.7 (-9.2, +8.4) M☉
Remnant mass: 65 (-13, +11) M☉
Effective spin: 0.14
Network SNR: 11.1

Propagation

Distance and statistical context

Luminosity distance: 3,100 (-1,300, +2,600) Mpc
Redshift: 0.53
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240908_082628

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

JSON record GWOSC event page