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GW190620_030421 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW190620_030421

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW190620_030421

Both component-mass lower bounds exceed 3 solar masses

Primary mass58 M☉

Secondary mass35 M☉

ObservedJun 20, 2019

Event identity

Classification and release

ID: gwtc:GW190620_030421
Event name: GW190620_030421
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: Thursday, June 20, 2019 at 3:04:21 AM UTC UTC
GPS time: 1,245,035,079.3

Source-frame posterior

Component and remnant masses

Primary mass: 58 (-13.3, +19.2) M☉
Secondary mass: 35 (-14.5, +13.1) M☉
Remnant mass: 88 (-12.4, +17.2) M☉
Effective spin: 0.34
Network SNR: 12.1

Propagation

Distance and statistical context

Luminosity distance: 2,910 (-1,320, +1,710) Mpc
Redshift: 0.5
Astrophysical probability: 0.9875
False-alarm rate: 0.011

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW190620_030421

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

JSON record GWOSC event page