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GW230708_230935 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230708_230935

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230708_230935

Both component-mass lower bounds exceed 3 solar masses

Primary mass64 M☉

Secondary mass40 M☉

ObservedJul 8, 2023

Event identity

Classification and release

ID: gwtc:GW230708_230935
Event name: GW230708_230935
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, July 8, 2023 at 11:09:35 PM UTC UTC
GPS time: 1,372,892,993.5

Source-frame posterior

Component and remnant masses

Primary mass: 64 (-15, +20) M☉
Secondary mass: 40 (-15, +14) M☉
Remnant mass: 99 (-15, +21) M☉
Effective spin: 0.01
Network SNR: 10

Propagation

Distance and statistical context

Luminosity distance: 3,500 (-1,600, +2,300) Mpc
Redshift: 0.59
Astrophysical probability: 0.99
False-alarm rate: 0.001

Provenance

Official source record

GWOSC · GWTC-4.1

GW230708_230935

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

JSON record GWOSC event page