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GW230930_110730 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230930_110730

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230930_110730

Both component-mass lower bounds exceed 3 solar masses

Primary mass34.5 M☉

Secondary mass24.4 M☉

ObservedSep 30, 2023

Event identity

Classification and release

ID: gwtc:GW230930_110730
Event name: GW230930_110730
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, September 30, 2023 at 11:07:30 AM UTC UTC
GPS time: 1,380,107,268.4

Source-frame posterior

Component and remnant masses

Primary mass: 34.5 (-7.9, +13.2) M☉
Secondary mass: 24.4 (-7.5, +8.4) M☉
Remnant mass: 56.3 (-9.6, +14.5) M☉
Effective spin: 0.02
Network SNR: 9

Propagation

Distance and statistical context

Luminosity distance: 4,900 (-2,500, +3,200) Mpc
Redshift: 0.76
Astrophysical probability: 0.99
False-alarm rate: 0.095

Provenance

Official source record

GWOSC · GWTC-4.1

GW230930_110730

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

JSON record GWOSC event page