The process of deducing transit-midpoint priors from π Men c TESS photometry data. The x-axis is listed in units of TESS Barycentric Julian Date (BTJD), which is equal to BJD – 2457000. Top: TESS sector 13. The dark gray points are binned and light gray unbinned. All binned data points the pipeline flags as being part of a transit (Z ≤ −3.3 in this case) are highlighted in red. Bottom: a singular transit. The transit-midpoint initial guess is the median of the red points. This process allows for an automatic and streamlined selection of transit-midpoint priors.