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GW230606_004305 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW230606_004305

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW230606_004305

Both component-mass lower bounds exceed 3 solar masses

Primary mass37.6 M☉

Secondary mass25.7 M☉

ObservedJun 6, 2023

Event identity

Classification and release

ID: gwtc:GW230606_004305
Event name: GW230606_004305
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-4.1
Preferred event version: v2
Observed at: Tuesday, June 6, 2023 at 12:43:05 AM UTC UTC
GPS time: 1,370,047,403.8

Source-frame posterior

Component and remnant masses

Primary mass: 37.6 (-7.6, +13.3) M☉
Secondary mass: 25.7 (-8.3, +8.2) M☉
Remnant mass: 60.8 (-8, +12.8) M☉
Effective spin: -0.11
Network SNR: 11.1

Propagation

Distance and statistical context

Luminosity distance: 2,800 (-1,400, +1,500) Mpc
Redshift: 0.48
Astrophysical probability: 0.99
False-alarm rate: 0.0004

Provenance

Official source record

GWOSC · GWTC-4.1

GW230606_004305

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

JSON record GWOSC event page