GRB 260311A

General information

GRB 260311A triggered Fermi/GBM at 03:35:40 UT on 11 Mar 2026 and is reported as a likely short GRB. An on-ground GBM localization is provided at RA 291.3°, Dec −43.5° (J2000) with 10.8° statistical uncertainty.

Wavelength coverage

• Gamma-ray: Detected by Fermi GBM; LAT boresight angle reported (111.0°) but no LAT detection is stated. No observations are mentioned in X-ray, UV, optical, IR, radio, TeV, gravitational waves, or neutrinos.

Lightcurve and spectrum

Redshift

What’s special vs typical

Reported as a likely short GRB (no additional atypical properties reported in the provided circular).