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GW200128_022011 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW200128_022011

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW200128_022011

Both component-mass lower bounds exceed 3 solar masses

Primary mass42.2 M☉

Secondary mass32.6 M☉

ObservedJan 28, 2020

Event identity

Classification and release

ID: gwtc:GW200128_022011
Event name: GW200128_022011
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: Tuesday, January 28, 2020 at 2:20:11 AM UTC UTC
GPS time: 1,264,213,229.9

Source-frame posterior

Component and remnant masses

Primary mass: 42.2 (-8.1, +11.6) M☉
Secondary mass: 32.6 (-9.2, +9.5) M☉
Remnant mass: 71 (-11, +16) M☉
Effective spin: 0.12
Network SNR: 10.6

Propagation

Distance and statistical context

Luminosity distance: 3,400 (-1,800, +2,100) Mpc
Redshift: 0.56
Astrophysical probability: 0.99
False-alarm rate: 0.0043

Provenance

Official source record

GWOSC · GWTC-3-confident

GW200128_022011

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

JSON record GWOSC event page