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GW230819_171910 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230819_171910

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230819_171910

Both component-mass lower bounds exceed 3 solar masses

Primary mass70 M☉

Secondary mass35 M☉

ObservedAug 19, 2023

Event identity

Classification and release

ID: gwtc:GW230819_171910
Event name: GW230819_171910
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 19, 2023 at 5:19:10 PM UTC UTC
GPS time: 1,376,500,768.4

Source-frame posterior

Component and remnant masses

Primary mass: 70 (-21, +43) M☉
Secondary mass: 35 (-19, +20) M☉
Remnant mass: 102 (-22, +37) M☉
Effective spin: -0.04
Network SNR: 9.9

Propagation

Distance and statistical context

Luminosity distance: 4,100 (-2,200, +3,800) Mpc
Redshift: 0.66
Astrophysical probability: 0.99
False-alarm rate: 0.011

Provenance

Official source record

GWOSC · GWTC-4.1

GW230819_171910

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

JSON record GWOSC event page