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Black Holes/Gravitational-wave mergers/GW170729

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW170729

Both component-mass lower bounds exceed 3 solar masses

Primary mass54.7 M☉

Secondary mass30.2 M☉

ObservedJul 29, 2017

Event identity

Classification and release

ID: gwtc:GW170729
Event name: GW170729
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: v2
Observed at: Saturday, July 29, 2017 at 6:56:29 PM UTC UTC
GPS time: 1,185,389,807.3

Source-frame posterior

Component and remnant masses

Primary mass: 54.7 (-12.8, +12.7) M☉
Secondary mass: 30.2 (-10.2, +11.9) M☉
Remnant mass: 80.3 (-10.2, +13.5) M☉
Effective spin: 0.29
Network SNR: 10.7

Propagation

Distance and statistical context

Luminosity distance: 2,490 (-1,230, +1,690) Mpc
Redshift: 0.44
Astrophysical probability: Not reported by GWOSC
False-alarm rate: Not reported by GWOSC

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW170729

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

JSON record GWOSC event page

GW170729 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda