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GW230927_153832 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230927_153832

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230927_153832

Both component-mass lower bounds exceed 3 solar masses

Primary mass21.7 M☉

Secondary mass16.6 M☉

ObservedSep 27, 2023

Event identity

Classification and release

ID: gwtc:GW230927_153832
Event name: GW230927_153832
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: Wednesday, September 27, 2023 at 3:38:32 PM UTC UTC
GPS time: 1,379,864,330.9

Source-frame posterior

Component and remnant masses

Primary mass: 21.7 (-2.8, +3.8) M☉
Secondary mass: 16.6 (-2.6, +2.5) M☉
Remnant mass: 36.5 (-2.1, +3.1) M☉
Effective spin: 0.03
Network SNR: 20.3

Propagation

Distance and statistical context

Luminosity distance: 1,190 (-540, +370) Mpc
Redshift: 0.23
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW230927_153832

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

JSON record GWOSC event page