KELT20b2023

Shifted and combined cross correlation function (CCF, left) and injection-recovery test (right) for Ni I. This 4.3𝜎 detection falls within our tentative detection range. The vertical and horizontal dashed lines in all CCF maps represent the 𝐾𝑝 (radial velocity semi amplitude of the planet) and 𝑣𝑠𝑦𝑠 (system radial velocity) parameters for which we should expect to find a signal.