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GW190925_232845 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW190925_232845

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW190925_232845

Both component-mass lower bounds exceed 3 solar masses

Primary mass20.8 M☉

Secondary mass15.5 M☉

ObservedSep 25, 2019

Event identity

Classification and release

ID: gwtc:GW190925_232845
Event name: GW190925_232845
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: v1
Observed at: Wednesday, September 25, 2019 at 11:28:45 PM UTC UTC
GPS time: 1,253,489,343.1

Source-frame posterior

Component and remnant masses

Primary mass: 20.8 (-2.9, +6.5) M☉
Secondary mass: 15.5 (-3.6, +2.5) M☉
Remnant mass: 34.9 (-2.6, +3.5) M☉
Effective spin: 0.09
Network SNR: 9.7

Propagation

Distance and statistical context

Luminosity distance: 930 (-350, +460) Mpc
Redshift: 0.19
Astrophysical probability: 0.9885
False-alarm rate: 0.0072

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW190925_232845

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

JSON record GWOSC event page