Fermi/GBM (8–900 keV) light curve and time bins of the associated time-resolved analysis of GRB160625B (upper panel). In the lower panel, we show the relative E_p,z−L_iso plane. The color scale is associated with the time bin in which the spectral analysis was performed. We show, for this GRB, the results of the synchrotron fit, and we represent the bins with fast-cooling spectra as triangles, and the bins with intermediate-cooling spectra as squares. The straight black line represents the Yonetonu relation obtained from Yonetoku et al. (2004).