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GW240920_124024 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240920_124024

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240920_124024

Both component-mass lower bounds exceed 3 solar masses

Primary mass37.1 M☉

Secondary mass31.9 M☉

ObservedSep 20, 2024

Event identity

Classification and release

ID: gwtc:GW240920_124024
Event name: GW240920_124024
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, September 20, 2024 at 12:40:24 PM UTC UTC
GPS time: 1,410,871,242.9

Source-frame posterior

Component and remnant masses

Primary mass: 37.1 (-2.8, +4) M☉
Secondary mass: 31.9 (-3.9, +3) M☉
Remnant mass: 65.6 (-2.4, +3.5) M☉
Effective spin: -0.04
Network SNR: 37.4

Propagation

Distance and statistical context

Luminosity distance: 1,090 (-320, +220) Mpc
Redshift: 0.21
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240920_124024

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

JSON record GWOSC event page