Ground-based photometry for TOI-260, from LCO-CTIO (left), LCO-SSO (middle), and LCO-SAAO (right). The orange horizontal bars indicate the timespan of the closest transit to each observation; the vertical bars indicate the transit midpoint and depth. The timing of the observations was planned from preliminary ephemerides; later additional TESS data showed them to be out of transit. Note that the target star in these image sequences was intentionally either strongly exposed or saturated (causing large scatter and/or systematics) for the purpose of searching for an eclipsing binary in fainter neighbouring stars that could be the cause of the TESS detection.