CCF maps of WASP-33b (left panels) and KELT-20b (right panels). The aligned CCF maps are shown in the top panels (assuming K_p values of 226.0 km s⁻¹ and 173.0 km s⁻¹ for WASP-33b and KELT-20b, respectively). The vertical dashed lines indicate the planetary trail; the horizontal dashed-dotted lines indicate ingress and egress from secondary eclipse. As described in Sect. 3.2, we masked the RV range of residual stellar Si lines in the CCF map of WASP-33b. In the bottom panels the collapsed CCF maps (gray lines) are compared to simulated CCFs (blue and red lines). The simulated CCFs that are rotationally broadened (by 7 km s⁻¹ and 3 km s⁻¹, respectively) are represented by the dashed lines. Those without broadening are represented by the solid lines. We note that in the case of KELT-20b, the simulated CCFs with and without broadening differ only marginally and therefore lie on top of each other.