Hard X-ray bolometric correction band as a function of the L_bol for Type II AGN. The filled and empty red stars indicate the BORUS and MYTORUS parameterizations, respectively, compared to other samples. In particular, we only include the WISSH QSOs with N_H > 10²³ cm⁻² (gray circles; Martocchia et al. 2017). The light black lines show the best fit (continuous line) and dispersion (dashed lines) of the K_bol, X − L_bol relation for Type II QSOs from Duras et al. (2020). We also plot the ASCA, COSMOS, and Swift-BAT samples, which only include Type II AGN.