General information
GRB 260311B was detected by Fermi/GBM at 18:57:55 UT on 2026-03-11 and classified as a likely LONG GRB. The on-ground GBM localization is centered at RA=278.5 deg, Dec=0.4 deg (J2000) with a reported statistical uncertainty of 11.7 deg.
Wavelength coverage
- Gamma-ray: Fermi/GBM trigger and localization reported.
- Optical: MASTER-Net observations (C filter) covering the GBM error region report multiple nondetections with upper limits.
Bands with no observations mentioned: X-ray, UV, infrared, radio, GeV (Fermi/LAT detection not reported), gravitational waves, neutrinos.
Lightcurve and spectrum
Redshift
What’s special vs typical