General information
GRB 260531B is a likely long gamma-ray burst detected at ~13:58 UT on 2026-05-31 by Fermi/GBM, with independent detections reported by GECAM-B and the Glowbug gamma-ray telescope.
Wavelength coverage
- Gamma-ray / hard X-ray: Fermi/GBM detection and localization; GECAM-B detection in ~70–6000 keV with T90 reported; Glowbug detection with reported significance and duration.
No observations were mentioned in: soft X-ray, ultraviolet, optical, infrared, radio, gravitational waves, neutrinos.
Lightcurve and spectrum
- GECAM-B: multiple pulses; duration (T90) = 12 +5/-3 s (70–6000 keV).
- Glowbug: onset 2026-05-31 13:57:58.840; duration 8.2 s; complex multi-peaked structure; total significance ~31.6 sigma.
Redshift
What’s special vs typical