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GW241009_220455 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW241009_220455

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW241009_220455

Both component-mass lower bounds exceed 3 solar masses

Primary mass33.2 M☉

Secondary mass25.5 M☉

ObservedOct 9, 2024

Event identity

Classification and release

ID: gwtc:GW241009_220455
Event name: GW241009_220455
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, October 9, 2024 at 10:04:55 PM UTC UTC
GPS time: 1,412,546,713.5

Source-frame posterior

Component and remnant masses

Primary mass: 33.2 (-6.6, +8.1) M☉
Secondary mass: 25.5 (-8.1, +5.9) M☉
Remnant mass: 56 (-10.2, +8.7) M☉
Effective spin: 0.11
Network SNR: 10

Propagation

Distance and statistical context

Luminosity distance: 2,900 (-1,300, +2,200) Mpc
Redshift: 0.5
Astrophysical probability: 0.99
False-alarm rate: 0.023

Provenance

Official source record

GWOSC · GWTC-5.0

GW241009_220455

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

JSON record GWOSC event page