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GW240919_061559 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240919_061559

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240919_061559

Both component-mass lower bounds exceed 3 solar masses

Primary mass38.3 M☉

Secondary mass29.6 M☉

ObservedSep 19, 2024

Event identity

Classification and release

ID: gwtc:GW240919_061559
Event name: GW240919_061559
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: Thursday, September 19, 2024 at 6:15:59 AM UTC UTC
GPS time: 1,410,761,777.2

Source-frame posterior

Component and remnant masses

Primary mass: 38.3 (-5.5, +6.6) M☉
Secondary mass: 29.6 (-5.9, +5.4) M☉
Remnant mass: 64.7 (-5.6, +6.5) M☉
Effective spin: -0.02
Network SNR: 16.9

Propagation

Distance and statistical context

Luminosity distance: 1,870 (-740, +820) Mpc
Redshift: 0.34
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240919_061559

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

JSON record GWOSC event page