General information
GRB 260513A was detected by Fermi/GBM at 21:24:18 UT on 13 May 2026 and is reported as a likely long GRB. MASTER-SAAO followed up the GBM error box beginning about 9068 s after the trigger and reported only optical upper limits.
Wavelength coverage
- Gamma-ray: Fermi/GBM trigger and localization reported.
- Optical: MASTER-SAAO (clear/unfiltered) upper limits to ~20.0 mag from Tmid−T0 ≈ 9098–9868 s.
No X-ray, UV, IR, radio, or GeV (LAT) observations/detections were reported in the provided circulars.
Lightcurve and spectrum
Redshift
What’s special vs typical