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GW230702_185453 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230702_185453

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230702_185453

Both component-mass lower bounds exceed 3 solar masses

Primary mass40 M☉

Secondary mass18 M☉

ObservedJul 2, 2023

Event identity

Classification and release

ID: gwtc:GW230702_185453
Event name: GW230702_185453
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 2, 2023 at 6:54:53 PM UTC UTC
GPS time: 1,372,359,311.7

Source-frame posterior

Component and remnant masses

Primary mass: 40 (-13, +21) M☉
Secondary mass: 18 (-6.6, +8.8) M☉
Remnant mass: 57 (-11, +16) M☉
Effective spin: 0.05
Network SNR: 10.1

Propagation

Distance and statistical context

Luminosity distance: 2,500 (-1,100, +2,000) Mpc
Redshift: 0.44
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-4.1

GW230702_185453

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

JSON record GWOSC event page