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GW200311_115853 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW200311_115853

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW200311_115853

Both component-mass lower bounds exceed 3 solar masses

Primary mass34.2 M☉

Secondary mass27.7 M☉

ObservedMar 11, 2020

Event identity

Classification and release

ID: gwtc:GW200311_115853
Event name: GW200311_115853
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: Wednesday, March 11, 2020 at 11:58:53 AM UTC UTC
GPS time: 1,267,963,151.3

Source-frame posterior

Component and remnant masses

Primary mass: 34.2 (-3.8, +6.4) M☉
Secondary mass: 27.7 (-5.9, +4.1) M☉
Remnant mass: 59 (-3.9, +4.8) M☉
Effective spin: -0.02
Network SNR: 17.8

Propagation

Distance and statistical context

Luminosity distance: 1,170 (-400, +280) Mpc
Redshift: 0.23
Astrophysical probability: 0.99
False-alarm rate: 0

Provenance

Official source record

GWOSC · GWTC-3-confident

GW200311_115853

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

JSON record GWOSC event page