Inverse cumulative distribution of Fermi/GBM SGRB peak photon fluxes. The solid red line shows the inverse cumulative number of SGRBs detected by GBM with spectral information available in the catalogue, as a function of the peak photon flux measured on a 64 ms timescale in the 50–300 keV band. The pink band shows the one-sigma-equivalent Poisson error. The dashed black line shows a power law for reference. The vertical dotted line shows the chosen value of the flux cut for the flux-limited sample, p_lim, GBM = 3.5 cm⁻² s⁻¹.