Diagram of an observation of the transiting exoplanet KELT-11 b (top panel) and the corresponding normalized flux from a real observation, also called a light curve (bottom panel). The phase, which labels the x-axis, is the position of the planet in its orbit with 0 (by convention) being the middle of the transit (t_mid). The transit starts at the event t₁ and finishes at the event t₄, spanning the transit duration t₁₄. The transit depth (Δ) is the observed normalized flux between in and out of transit situations. The observation is adapted from Changeat et al. (2020b).