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Fig. 11.
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Spectra and residuals of the four eROSITA observations. The spectra are binned for visualization purposes. In the same color as the spectra, the PCA background model is shown for each observation, while the dashed lines show the best-fit model for each eRASS. There is a drastic photon drop in eRASS2 and a rise in eRASS4.
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