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Fig. 4
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X-ray spectra of UCDs associated with XMM-Newton (the first five panels) and eROSITA (the last two panels) sources that have more than 200 and 30 net counts, respectively. The spectra are plotted together with the best-fitting apec model and the residuals (both shown in green); see text in Sect. 3.1.3 and Table 6.
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