S251117bc
Binary Black HoleMonday, 17 November 2025GraceDB-Live
M₁—
M₂—
Total—
Distance—
SNR—
What happened
Two black holes — ? and ? times the mass of our Sun — spiralled into each other and merged. In the final fraction of a second, they radiated more energy than all the stars in the observable universe combined.
Detection parameters
- Event
- S251117bc
- Catalog
- GraceDB-Live
- GPS time
- 1447403216.3
- Network SNR
- —
- Sky area 90%
- —
Source properties
- Type
- Binary Black Hole
- Mass 1
- —
- Mass 2
- —
- Chirp mass
- —
- Final mass
- —
- Distance
- —
- Redshift
- —