General information
GRB 260507B / EP260507a was reported with EP trigger time T0=2026-05-07 13:47:57 UTC, and Fermi-GBM reports full coverage but no onboard trigger, with a weak sub-threshold targeted-search signal temporally and spatially consistent with EP.
Wavelength coverage
- Gamma-ray/X-ray: EP detected EP260507a; Fermi-GBM targeted search found a weak transient consistent with the EP localization.
No observations were mentioned in optical/UV, infrared, radio, or gravitational waves.
Lightcurve and spectrum
- A most significant excess is reported at approximately T0-4 s on a 16 s timescale.
- Best-fit targeted-search spectral template is a soft Band function with Epeak=70 keV, alpha=-1.9, beta=-3.7.
Redshift
What’s special vs typical