Light curves of the 12 most variable DR1 sources. The bin size is one eroday, and the energy range is (0.6–2.3) keV. For the normalised excess variance and the maximum amplitude variability, the values and significance (NEV_σ, AMP_σ) in units of σ are indicated along the top of each panel. As in Table 1, the objects are ordered by significance (NEV_σ or AMP_σ, whichever is larger) from top left to bottom right. The Bayesian excess variance is also indicated (SCATT), with the 10% (bottom, SCATT_LO) and 90% quantiles (top). The IAU name is given at the top of each figure. The x-axis shows the time in MJD units normalised to the launch of eROSITA on 2019-12-11, 21:30 (GMD) in days. The large variability of GX 339–4 is interpreted as due to pile-up (cf. Sect. 5.5.2.).