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GW170814 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW170814

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW170814

Both component-mass lower bounds exceed 3 solar masses

Primary mass30.9 M☉

Secondary mass24.9 M☉

ObservedAug 14, 2017

Event identity

Classification and release

ID: gwtc:GW170814
Event name: GW170814
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-2.1-confident
Preferred event version: v4
Observed at: Monday, August 14, 2017 at 10:30:43 AM UTC UTC
GPS time: 1,186,741,861.5

Source-frame posterior

Component and remnant masses

Primary mass: 30.9 (-3.3, +5.4) M☉
Secondary mass: 24.9 (-4, +3) M☉
Remnant mass: 53.2 (-2.7, +3.2) M☉
Effective spin: 0.08
Network SNR: 17.7

Propagation

Distance and statistical context

Luminosity distance: 610 (-230, +160) Mpc
Redshift: 0.13
Astrophysical probability: Not reported by GWOSC
False-alarm rate: Not reported by GWOSC

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW170814

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

JSON record GWOSC event page