#S250927cy
Second #GravitationalWave candidate of the day #S250927cy

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

False alarm rate 1 in 0.6 yr
GraceDB gracedb.ligo.org/superevents/...
GCN gcn.nasa.gov/circulars/42...
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September 27, 2025 at 7:42 PM