Initial sky localization. 90% area 3,700 sq deg.

Initial three-dimensional volume localization. Distance around 7.2 Gpc.

Celebrate Diwali with #GravitationalWave candidate #S251021u

If real, the source is probably a binary black hole (chirp mass ~22–88 solar masses)

False alarm rate 1 in 14 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
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