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GW230805_034249 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230805_034249

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230805_034249

Both component-mass lower bounds exceed 3 solar masses

Primary mass32.2 M☉

Secondary mass22.6 M☉

ObservedAug 5, 2023

Event identity

Classification and release

ID: gwtc:GW230805_034249
Event name: GW230805_034249
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: Saturday, August 5, 2023 at 3:42:50 AM UTC UTC
GPS time: 1,375,242,188

Source-frame posterior

Component and remnant masses

Primary mass: 32.2 (-7.3, +12.3) M☉
Secondary mass: 22.6 (-7.7, +7.8) M☉
Remnant mass: 52.4 (-9.2, +13) M☉
Effective spin: 0.06
Network SNR: 9.5

Propagation

Distance and statistical context

Luminosity distance: 3,500 (-1,700, +2,500) Mpc
Redshift: 0.58
Astrophysical probability: 0.99
False-alarm rate: 0.0003

Provenance

Official source record

GWOSC · GWTC-4.1

GW230805_034249

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

JSON record GWOSC event page