GRB 260310A: Long GRB with associated Type Ic-BL supernova at z=0.153
Event ID: GBM_794811435
Significance: high
Notices: 7
Circulars: 58
Generated: Thu, 09 Jul 2026 09:09:18 GMT
AI Summary
Fermi GBM detected a long gamma-ray burst (T90=86s, Ep=175 keV, Eiso=9.8×10⁵⁰ erg) on 2026-03-10 at 04:57:10 UTC, with optical counterpart AT2026fgk identified at redshift z=0.153. Multi-wavelength follow-up revealed a bright, evolving optical/infrared afterglow with clear supernova features emerging by day 17, classified as Type Ic-BL SN near maximum light. X-ray observations detected a rebrightening episode around day 8-10, with radio detections showing strong emission across cm to mm wavelengths, consistent with a standard GRB afterglow powered by a massive star collapse.