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GW200220_124850 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW200220_124850

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW200220_124850

Both component-mass lower bounds exceed 3 solar masses

Primary mass38.9 M☉

Secondary mass27.9 M☉

ObservedFeb 20, 2020

Event identity

Classification and release

ID: gwtc:GW200220_124850
Event name: GW200220_124850
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-3-confident
Preferred event version: v1
Observed at: Thursday, February 20, 2020 at 12:48:50 PM UTC UTC
GPS time: 1,266,238,148.1

Source-frame posterior

Component and remnant masses

Primary mass: 38.9 (-8.6, +14.1) M☉
Secondary mass: 27.9 (-9, +9.2) M☉
Remnant mass: 64 (-11, +16) M☉
Effective spin: -0.07
Network SNR: 8.5

Propagation

Distance and statistical context

Luminosity distance: 4,000 (-2,200, +2,800) Mpc
Redshift: 0.66
Astrophysical probability: 0.8258
False-alarm rate: 30

Provenance

Official source record

GWOSC · GWTC-3-confident

GW200220_124850

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

JSON record GWOSC event page