GRB 260402B

General information

GRB 260402B was triggered and localized by Fermi/GBM at 22:57:17 UT on 2026-04-02, and a ground search reports it was also detected by GECAM-B at essentially the same T0.

Wavelength coverage

• Gamma-rays / hard X-rays: Detected by Fermi/GBM; GECAM-B reports light curves in ~70–6000 keV.

No observations are mentioned in radio, optical/IR, UV, soft X-rays, TeV, neutrinos, or gravitational waves.

Lightcurve and spectrum

GECAM-B reports the burst mainly consists of one pulse with T90 = 2.0 (+0.5/-1.0) s.

Redshift

What’s special vs typical