X-ray light curves extracted as described in Sect. 2.3 and identified via our algorithm described in Sect. 2.1. The four light curves in black denote randomly selected sources from initial FXRTs found in the CSC2. For comparison, we show in red the FXRT sources CDF-S XT1 and CDF-S XT2. For visualization purposes, background-subtracted light curves are presented with either 1 ks or 2 ks bins with 1σ errors. In all cases, the vertical dashed gray line represents the end of the observation.