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GW240703_191355 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW240703_191355

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW240703_191355

Both component-mass lower bounds exceed 3 solar masses

Primary mass34.4 M☉

Secondary mass26.4 M☉

ObservedJul 3, 2024

Event identity

Classification and release

ID: gwtc:GW240703_191355
Event name: GW240703_191355
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: Wednesday, July 3, 2024 at 7:13:55 PM UTC UTC
GPS time: 1,404,069,253.3

Source-frame posterior

Component and remnant masses

Primary mass: 34.4 (-6.2, +8.5) M☉
Secondary mass: 26.4 (-6.7, +5.9) M☉
Remnant mass: 58.3 (-8.8, +8) M☉
Effective spin: 0.05
Network SNR: 10.1

Propagation

Distance and statistical context

Luminosity distance: 1,880 (-860, +1,540) Mpc
Redshift: 0.34
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-5.0

GW240703_191355

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

JSON record GWOSC event page