General information
GRB 260403A is reported as a likely long GRB, triggered and localized by Fermi/GBM at 2026-04-03 02:31:27 UT, with an independent detection by AstroSat/CZTI.
Wavelength coverage
- Gamma-rays / hard X-rays: Detected by Fermi GBM; detected by AstroSat CZTI (20–200 keV) with faint signal in the CsI veto detector (100–500 keV).
No observations were mentioned in optical/IR, UV, soft X-rays, radio, TeV, neutrinos, or gravitational waves.
Lightcurve and spectrum
Redshift
What’s special vs typical