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GW151226 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW151226

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW151226

Both component-mass lower bounds exceed 3 solar masses

Primary mass14.2 M☉

Secondary mass7.5 M☉

ObservedDec 26, 2015

Event identity

Classification and release

ID: gwtc:GW151226
Event name: GW151226
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: v3
Observed at: Saturday, December 26, 2015 at 3:38:53 AM UTC UTC
GPS time: 1,135,136,350.6

Source-frame posterior

Component and remnant masses

Primary mass: 14.2 (-3.6, +11.1) M☉
Secondary mass: 7.5 (-2.8, +2.4) M☉
Remnant mass: 20.7 (-1.6, +8.6) M☉
Effective spin: 0.2
Network SNR: 12.7

Propagation

Distance and statistical context

Luminosity distance: 460 (-200, +160) 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

GW151226

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

JSON record GWOSC event page