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GW230723_101834 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230723_101834

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230723_101834

Both component-mass lower bounds exceed 3 solar masses

Primary mass16.6 M☉

Secondary mass10.6 M☉

ObservedJul 23, 2023

Event identity

Classification and release

ID: gwtc:GW230723_101834
Event name: GW230723_101834
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: Sunday, July 23, 2023 at 10:18:34 AM UTC UTC
GPS time: 1,374,142,732.4

Source-frame posterior

Component and remnant masses

Primary mass: 16.6 (-3.3, +5.6) M☉
Secondary mass: 10.6 (-2.7, +3) M☉
Remnant mass: 26.4 (-2.6, +3.8) M☉
Effective spin: -0.18
Network SNR: 10.1

Propagation

Distance and statistical context

Luminosity distance: 1,610 (-930, +680) Mpc
Redshift: 0.3
Astrophysical probability: 0.99
False-alarm rate: 0.0002

Provenance

Official source record

GWOSC · GWTC-4.1

GW230723_101834

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

JSON record GWOSC event page