FRB 20220610A is the most distant and energetic fast radio burst ever recorded. Detected by ASKAP in Western Australia, its extreme dispersion measure (DM = 1458.1 pc cm⁻³) pointed to a deep cosmological origin. Follow-up imaging with ESO's Very Large Telescope (VLT) localized the burst to a dense group of at least five interacting galaxies 8 billion light-years away.
| Observatory / Instrument | Spectral Regime | Observational Detection & Counterpart Findings |
|---|---|---|
|
ESO VLT (FORS2)
|
Optical Spectroscopy
|
Measured redshift z = 1.016 ± 0.002, resolving host galaxy group structure.
|
|
Hubble Space Telescope
|
Near-IR (WFC3)
|
High-resolution imaging confirmed merger morphology of host system.
|
|
ATCA
|
Radio (2.1 GHz)
|
No persistent radio continuum counterpart above 15 µJy.
|