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GW240621_195059 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240621_195059

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240621_195059

Both component-mass lower bounds exceed 3 solar masses

Primary mass36.8 M☉

Secondary mass29.7 M☉

ObservedJun 21, 2024

Event identity

Classification and release

ID: gwtc:GW240621_195059
Event name: GW240621_195059
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 7:50:59 PM UTC UTC
GPS time: 1,403,034,677.4

Source-frame posterior

Component and remnant masses

Primary mass: 36.8 (-3.7, +4.4) M☉
Secondary mass: 29.7 (-5.2, +4.1) M☉
Remnant mass: 62.9 (-2.6, +4.2) M☉
Effective spin: Not reported by GWOSC
Network SNR: 28.2

Propagation

Distance and statistical context

Luminosity distance: 1,210 (-430, +260) Mpc
Redshift: 0.23
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240621_195059

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

JSON record GWOSC event page