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GW250101_011205 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW250101_011205

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW250101_011205

Both component-mass lower bounds exceed 3 solar masses

Primary mass30 M☉

Secondary mass21.1 M☉

ObservedJan 1, 2025

Event identity

Classification and release

ID: gwtc:GW250101_011205
Event name: GW250101_011205
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-5.0
Preferred event version: v1
Observed at: Wednesday, January 1, 2025 at 1:12:05 AM UTC UTC
GPS time: 1,419,729,143

Source-frame posterior

Component and remnant masses

Primary mass: 30 (-5.8, +8.8) M☉
Secondary mass: 21.1 (-7.2, +5.9) M☉
Remnant mass: 48.7 (-6.2, +8.8) M☉
Effective spin: -0.05
Network SNR: 9.8

Propagation

Distance and statistical context

Luminosity distance: 3,200 (-1,500, +1,700) Mpc
Redshift: 0.54
Astrophysical probability: 0.99
False-alarm rate: 0.02

Provenance

Official source record

GWOSC · GWTC-5.0

GW250101_011205

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

JSON record GWOSC event page