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GW191103_012549 | Gravitational-wave mergers | Apex Andromeda | Apex Andromeda

Black Holes/Gravitational-wave mergers/GW191103_012549

ConfirmedBinary Black Hole

GWOSC compact-binary event

GW191103_012549

Both component-mass lower bounds exceed 3 solar masses

Primary mass11.8 M☉

Secondary mass7.9 M☉

ObservedNov 3, 2019

Event identity

Classification and release

ID: gwtc:GW191103_012549
Event name: GW191103_012549
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: Sunday, November 3, 2019 at 1:25:49 AM UTC UTC
GPS time: 1,256,779,567.5

Source-frame posterior

Component and remnant masses

Primary mass: 11.8 (-2.2, +6.2) M☉
Secondary mass: 7.9 (-2.4, +1.7) M☉
Remnant mass: 19 (-1.7, +3.8) M☉
Effective spin: 0.21
Network SNR: 8.9

Propagation

Distance and statistical context

Luminosity distance: 990 (-470, +500) Mpc
Redshift: 0.2
Astrophysical probability: 0.9432
False-alarm rate: 0.46

Provenance

Official source record

GWOSC · GWTC-3-confident

GW191103_012549

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

JSON record GWOSC event page