Cross-correlation templates of all atoms, ions, and molecules considered in this study. The plots show negative transit depth above the spectral continuum (−d_t) of a 1.5 R_J planet orbiting a 1 R_⊙ star in ppm as a function of wavelength. Templates for three different temperatures are depicted: 5000 K (blue), 3000 K (green), and 2000 K (orange). Figures without a line symbolise species where either no line list data or thermochemical data are available.