Five-event analysis of TIC 31065777. (a) Phase-folded TESS cadences and bin medians. (b) Fitted 1.5 pixel aperture depths; the dashed line is the median. (c) Event-center residuals from the linear ephemeris; shading marks the largest leave-one-sector-out prediction error. (d) Mean positions from independent TESS PRF and Gaussian fits to the difference images. Error bars show cadence-bootstrap 16th–84th percentiles, and the dashed line is the 0.2 pixel criterion of V. B. Kostov et al. (2025).