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GW200209_085452 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW200209_085452

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW200209_085452

Both component-mass lower bounds exceed 3 solar masses

Primary mass35.6 M☉

Secondary mass27.1 M☉

ObservedFeb 9, 2020

Event identity

Classification and release

ID: gwtc:GW200209_085452
Event name: GW200209_085452
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: Sunday, February 9, 2020 at 8:54:52 AM UTC UTC
GPS time: 1,265,273,710.1

Source-frame posterior

Component and remnant masses

Primary mass: 35.6 (-6.8, +10.5) M☉
Secondary mass: 27.1 (-7.8, +7.8) M☉
Remnant mass: 59.9 (-8.9, +13.1) M☉
Effective spin: -0.12
Network SNR: 9.6

Propagation

Distance and statistical context

Luminosity distance: 3,400 (-1,800, +1,900) Mpc
Redshift: 0.57
Astrophysical probability: 0.9724
False-alarm rate: 0.046

Provenance

Official source record

GWOSC · GWTC-3-confident

GW200209_085452

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

JSON record GWOSC event page