Photon transfer curve for the IMX411 sensor obtained from statistics build from individual physical pixels over the full scale. Top: the three colors correspond to three independent datasets obtained with different illumination levels and exposure times (see Table 3). The black solid line presents the linear relation from Eq. (A.9) using the best-fit gain value. Middle: residuals to the linear model. The dashed black lines show 1% variations of the integral gain. Bottom: residuals to the full model, including the effect of a 512-bit periodical DNL with 0.65 ADU of amplitude, and provision for curvature of the PTC due to influence of brighter-fatter-like effect in the physical pixels.