Rest-frame SED peak photon energy E_peak versus the isotropic-equivalent energy E_iso for our BHNS population. In the top panel we assume a jet core half-opening angle θ_j = 3.4°, in the lower panel we assume θ_j = 15°. The filled green colored regions contain 50%, 90%, and 99% of the binaries both GRB Prompt- and LVKI 05-detectable. The magenta lines contain 50%, 90%, and 99% (solid, dashed and dotted, respectively) of the GRB prompt-detectable binaries. The black dashed line contains 90% of the O5-detectable binaries. The black dots with error bars represent a SGRB sample for comparison (Salafia et al. 2023). The orange dot is GRB170817A.