General information
GRB 251216A was detected by Fermi/GBM at 2025-12-16 09:38:09 UT and classified as a likely long GRB. The on-ground GBM localization is centered at RA=290.9 deg, Dec=52.0 deg (J2000) with a 9.3 deg statistical uncertainty.
Wavelength coverage
- Gamma-ray: Fermi GBM trigger and localization reported.
- Optical: MASTER-Kislovodsk (MASTER-Net) follow-up starting ~1.75e4 s after trigger reported only upper limits (clear band, limits reaching ~18.4–19.0 mag in some pointings).
No observations were mentioned for X-ray, UV, near-IR, radio, or GeV (LAT).
Lightcurve and spectrum
Redshift
What’s special vs typical