Initial sky localization. 90% area 170 sq deg.

Initial three-dimensional volume localization. Distance around 2.1 Gpc.

Halloween #GravitationalWave candidate #S251031cq

If real, the source is probably a binary black hole (chirp mass ~22–44 solar masses)

False alarm rate 1 in 45 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
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