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GW230924_124453 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230924_124453

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230924_124453

Both component-mass lower bounds exceed 3 solar masses

Primary mass28.8 M☉

Secondary mass23.2 M☉

ObservedSep 24, 2023

Event identity

Classification and release

ID: gwtc:GW230924_124453
Event name: GW230924_124453
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, September 24, 2023 at 12:44:53 PM UTC UTC
GPS time: 1,379,594,711.8

Source-frame posterior

Component and remnant masses

Primary mass: 28.8 (-4, +5.7) M☉
Secondary mass: 23.2 (-4.3, +4.4) M☉
Remnant mass: 49.4 (-4.6, +6.7) M☉
Effective spin: 0.02
Network SNR: 13.5

Propagation

Distance and statistical context

Luminosity distance: 2,400 (-1,000, +1,000) Mpc
Redshift: 0.42
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW230924_124453

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

JSON record GWOSC event page