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GW240825_055146 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240825_055146

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240825_055146

Both component-mass lower bounds exceed 3 solar masses

Primary mass13.2 M☉

Secondary mass7.9 M☉

ObservedAug 25, 2024

Event identity

Classification and release

ID: gwtc:GW240825_055146
Event name: GW240825_055146
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, August 25, 2024 at 5:51:47 AM UTC UTC
GPS time: 1,408,600,325

Source-frame posterior

Component and remnant masses

Primary mass: 13.2 (-3, +5.8) M☉
Secondary mass: 7.9 (-2.2, +2) M☉
Remnant mass: 20.3 (-2, +3.9) M☉
Effective spin: 0.07
Network SNR: 10.3

Propagation

Distance and statistical context

Luminosity distance: 1,250 (-550, +530) Mpc
Redshift: 0.24
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240825_055146

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

JSON record GWOSC event page