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GW150914 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW150914

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW150914

Both component-mass lower bounds exceed 3 solar masses

Primary mass34.6 M☉

Secondary mass30 M☉

ObservedSep 14, 2015

Event identity

Classification and release

ID: gwtc:GW150914
Event name: GW150914
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: v4
Observed at: Monday, September 14, 2015 at 9:50:45 AM UTC UTC
GPS time: 1,126,259,462.4

Source-frame posterior

Component and remnant masses

Primary mass: 34.6 (-2.6, +4.4) M☉
Secondary mass: 30 (-4.6, +2.9) M☉
Remnant mass: 61.5 (-2.9, +3.4) M☉
Effective spin: -0.04
Network SNR: 26

Propagation

Distance and statistical context

Luminosity distance: 470 (-160, +140) Mpc
Redshift: 0.1
Astrophysical probability: Not reported by GWOSC
False-alarm rate: Not reported by GWOSC

Provenance

Official source record

GWOSC · GWTC-2.1-confident

GW150914

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

JSON record GWOSC event page