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GW240505_133552 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240505_133552

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240505_133552

Both component-mass lower bounds exceed 3 solar masses

Primary mass31 M☉

Secondary mass23.1 M☉

ObservedMay 5, 2024

Event identity

Classification and release

ID: gwtc:GW240505_133552
Event name: GW240505_133552
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: Sunday, May 5, 2024 at 1:35:52 PM UTC UTC
GPS time: 1,398,951,370.6

Source-frame posterior

Component and remnant masses

Primary mass: 31 (-5.9, +9.2) M☉
Secondary mass: 23.1 (-6.7, +6.8) M☉
Remnant mass: 51.8 (-7.3, +11.3) M☉
Effective spin: -0.13
Network SNR: 9.4

Propagation

Distance and statistical context

Luminosity distance: 4,700 (-2,100, +2,600) Mpc
Redshift: 0.74
Astrophysical probability: 0.98
False-alarm rate: 0.13

Provenance

Official source record

GWOSC · GWTC-5.0

GW240505_133552

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

JSON record GWOSC event page