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Black Holes/Gravitational-wave mergers/GW200316_215756

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW200316_215756

Both component-mass lower bounds exceed 3 solar masses

Primary mass13.1 M☉

Secondary mass7.8 M☉

ObservedMar 16, 2020

Event identity

Classification and release

ID: gwtc:GW200316_215756
Event name: GW200316_215756
Classification: Binary Black Hole
Composition status: Confirmed
Confidence boundary: Both component-mass lower bounds exceed 3 solar masses
Catalog: GWTC-3-confident
Preferred event version: v1
Observed at: Monday, March 16, 2020 at 9:57:56 PM UTC UTC
GPS time: 1,268,431,094.1

Source-frame posterior

Component and remnant masses

Primary mass: 13.1 (-2.9, +10.2) M☉
Secondary mass: 7.8 (-2.9, +2) M☉
Remnant mass: 20.2 (-1.9, +7.4) M☉
Effective spin: 0.13
Network SNR: 10.3

Propagation

Distance and statistical context

Luminosity distance: 1,120 (-440, +480) Mpc
Redshift: 0.22
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-3-confident

GW200316_215756

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

JSON record GWOSC event page

GW200316_215756 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda