TS_EBL profiles of the EBL detection as a function of the renormalizing parameter b, for the EBL models of J. D. Finke et al. (2022, left), A. Saldana-Lopez et al. (2021, center), and A. Franceschini et al. (2008, right). The dark and light shaded regions show the 1σ and 2σ confidence intervals around the best-fit b values. The dashed red, blue, and black lines correspond to the FSRQ, BL Lac, and combined profiles, respectively. The best-fit parameters are reported in Table 2.