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GW231127_165300 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW231127_165300

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW231127_165300

Both component-mass lower bounds exceed 3 solar masses

Primary mass45 M☉

Secondary mass28 M☉

ObservedNov 27, 2023

Event identity

Classification and release

ID: gwtc:GW231127_165300
Event name: GW231127_165300
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: Monday, November 27, 2023 at 4:53:00 PM UTC UTC
GPS time: 1,385,139,198.9

Source-frame posterior

Component and remnant masses

Primary mass: 45 (-12, +18) M☉
Secondary mass: 28 (-12, +13) M☉
Remnant mass: 71 (-14, +21) M☉
Effective spin: 0.05
Network SNR: 9.9

Propagation

Distance and statistical context

Luminosity distance: 4,500 (-2,500, +3,600) Mpc
Redshift: 0.71
Astrophysical probability: 0.99
False-alarm rate: 0.01

Provenance

Official source record

GWOSC · GWTC-4.1

GW231127_165300

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

JSON record GWOSC event page