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GW240531_075248 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240531_075248

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240531_075248

Both component-mass lower bounds exceed 3 solar masses

Primary mass33 M☉

Secondary mass22.6 M☉

ObservedMay 31, 2024

Event identity

Classification and release

ID: gwtc:GW240531_075248
Event name: GW240531_075248
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, May 31, 2024 at 7:52:48 AM UTC UTC
GPS time: 1,401,177,186.5

Source-frame posterior

Component and remnant masses

Primary mass: 33 (-7.6, +10.4) M☉
Secondary mass: 22.6 (-6.4, +7.6) M☉
Remnant mass: 53.1 (-8.7, +12.2) M☉
Effective spin: 0.04
Network SNR: 9.3

Propagation

Distance and statistical context

Luminosity distance: 4,100 (-2,200, +2,800) Mpc
Redshift: 0.67
Astrophysical probability: 0.99
False-alarm rate: 0.0039

Provenance

Official source record

GWOSC · GWTC-5.0

GW240531_075248

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

JSON record GWOSC event page