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GW231001_140220 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231001_140220

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231001_140220

Both component-mass lower bounds exceed 3 solar masses

Primary mass76 M☉

Secondary mass41 M☉

ObservedOct 1, 2023

Event identity

Classification and release

ID: gwtc:GW231001_140220
Event name: GW231001_140220
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, October 1, 2023 at 2:02:20 PM UTC UTC
GPS time: 1,380,204,158.7

Source-frame posterior

Component and remnant masses

Primary mass: 76 (-22, +25) M☉
Secondary mass: 41 (-16, +18) M☉
Remnant mass: 111 (-22, +29) M☉
Effective spin: -0.04
Network SNR: 11.5

Propagation

Distance and statistical context

Luminosity distance: 4,400 (-2,400, +3,900) Mpc
Redshift: 0.7
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW231001_140220

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

JSON record GWOSC event page