Examples of TESS data for an eclipse of V459 Cas (a) with 2-min cadence, and V501 Mon (c) with 30-min cadence. In panels (b) and (d) the black line shows the bisector corresponding to each eclipse. The computed time of minimum for each system, which is used as reference time in the plots, is marked as a black-dashed line in panels a and c. Its uncertainty is illustrated in panels b and d as a read shaded area. The resulting timing uncertainty is 3.3 s for V459 Cas and 22.0 s for V501 Mon.