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GW240621_200935 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240621_200935

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240621_200935

Both component-mass lower bounds exceed 3 solar masses

Primary mass41.6 M☉

Secondary mass31.6 M☉

ObservedJun 21, 2024

Event identity

Classification and release

ID: gwtc:GW240621_200935
Event name: GW240621_200935
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: Friday, June 21, 2024 at 8:09:35 PM UTC UTC
GPS time: 1,403,035,793.5

Source-frame posterior

Component and remnant masses

Primary mass: 41.6 (-8.3, +11.6) M☉
Secondary mass: 31.6 (-9.5, +9.8) M☉
Remnant mass: 70 (-11, +16) M☉
Effective spin: -0.09
Network SNR: 10.7

Propagation

Distance and statistical context

Luminosity distance: 4,800 (-2,400, +3,000) Mpc
Redshift: 0.75
Astrophysical probability: 0.99
False-alarm rate: 0.0012

Provenance

Official source record

GWOSC · GWTC-5.0

GW240621_200935

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

JSON record GWOSC event page