Short Spike, Long Story: Episode-Dependent Shifts of Long-Duration Type-I GRBs on $E_{\mathrm{p},\mathrm{z}}$--$E_{\mathrm{iso}}$ Plane

Ya-Hui Jiang, Run-Chao Chen, Zhen-Yu Yan +3

Observations of peculiar GRBs have challenged the traditional $T_{90}$-based classification, demonstrating that duration does not map uniquely onto progenitor type. A striking clas…