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GW230803_033412 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230803_033412

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230803_033412

Both component-mass lower bounds exceed 3 solar masses

Primary mass44 M☉

Secondary mass29 M☉

ObservedAug 3, 2023

Event identity

Classification and release

ID: gwtc:GW230803_033412
Event name: GW230803_033412
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: Thursday, August 3, 2023 at 3:34:12 AM UTC UTC
GPS time: 1,375,068,870.4

Source-frame posterior

Component and remnant masses

Primary mass: 44 (-12, +19) M☉
Secondary mass: 29 (-10, +12) M☉
Remnant mass: 70 (-15, +21) M☉
Effective spin: 0.07
Network SNR: 9.4

Propagation

Distance and statistical context

Luminosity distance: 5,000 (-2,600, +4,000) Mpc
Redshift: 0.78
Astrophysical probability: 0.99
False-alarm rate: 0.044

Provenance

Official source record

GWOSC · GWTC-4.1

GW230803_033412

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

JSON record GWOSC event page