Comparison between the detection efficiency in our simulated sample and that used in the inference. The solid black line shows the detection efficiency model p_det, GBM from S23 as a function of the SGRB photon flux, assuming E_p, obs = 100 keV. The thick coloured lines show the hard-threshold detection efficiency models assumed in our inference of the simulated sample described in Sect. 4, with different colours indicating different assumed photon flux thresholds, as in Figure 5. For each of these analyses, only the SGRBs above the assumed threshold were included in the inference.