A short-duration gravitational wave burst (approx. 0.1 seconds) resulting from the collision of two massive black holes of 85 M☉ and 66 M☉. The primary black hole fell directly inside the pair-instability supernova mass gap, where stellar core-collapse theoretically cannot produce remnants. The remnant was a 142 M☉ intermediate-mass black hole.
| Observatory / Instrument | Spectral Regime | Observational Detection & Counterpart Findings |
|---|---|---|
|
ZTF
|
Optical (g, r)
|
Candidate optical flare in AGN J1249+3449 investigated as potential accretion disk kick counterpart.
|
|
Fermi LAT
|
High-energy Gamma
|
No high-energy counterpart observed.
|