Optimising spectroscopic observations of transiting exoplanets Linn Boldt-Christmas, Fabio Lesjak, Ansgar Wehrhahn, Nikolai Piskunov, Adam D. Rains, Lisa Nortmann and Oleg Kochukhov A&A, 683 (2024) A244 Published online: 29 March 2024 DOI: 10.1051/0004-6361/202347398