Average apparent jet structure in the L − E_p plane. The solid turquoise line connects the points at varying viewing angles, where ⟨ ⋅ ⟩ represents the median, from the full sample analysis. The turquoise shaded area encompasses the corresponding 90% credible range. Grey lines show 100 posterior samples of the lines from the same analysis. The dashed green line and yellow area show the corresponding results for the flux-limited sample analysis. The crosses mark the positions of the Fermi/GBM SGRBs with known redshifts (all in red except for GRB 170817A, which is shown in blue). The inset shows the posterior probability density on the y parameter that sets the slope of the correlation between the on-axis luminosity and the on-axis SED peak photon energy, with the results of the two analyses colour coded as in the main panel.