General information
GRB 251217A was detected by Fermi/GBM on 2025-12-17 and reported as a likely long GRB, with an on-ground real-time localization. MASTER-Net reported optical follow-up observations of the GBM error region and found no transient counterpart to their limiting magnitudes.
Wavelength coverage
- Gamma-rays: Detected and localized by Fermi/GBM.
- Optical: MASTER-Tunka (MASTER-Net) reported clear/unfiltered-band imaging and only upper limits (no counterpart claimed).
No observations were mentioned in X-ray, UV, infrared, radio, or TeV bands.
Lightcurve and spectrum
Redshift
What’s special vs typical