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GW190408_181802 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW190408_181802

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW190408_181802

Both component-mass lower bounds exceed 3 solar masses

Primary mass24.8 M☉

Secondary mass18.5 M☉

ObservedApr 8, 2019

Event identity

Classification and release

ID: gwtc:GW190408_181802
Event name: GW190408_181802
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: Monday, April 8, 2019 at 6:18:02 PM UTC UTC
GPS time: 1,238,782,700.2

Source-frame posterior

Component and remnant masses

Primary mass: 24.8 (-3.5, +5.4) M☉
Secondary mass: 18.5 (-4, +3.3) M☉
Remnant mass: 41.4 (-2.9, +3.9) M☉
Effective spin: -0.03
Network SNR: 14.6

Propagation

Distance and statistical context

Luminosity distance: 1,540 (-620, +440) Mpc
Redshift: 0.29
Astrophysical probability: 1
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW190408_181802

Last synchronized 9/12/2026, 1:40:20 AM UTC.

JSON record GWOSC event page