Fig. 5.
Comparison between the 2003 XMM-Newton (in blue) and 2017 Chandra (in red) spectrum of SDSS J1030 + 0524. Both spectra have been corrected for the effective response. The XMM-Newton spectrum is the average of the three EPIC cameras (with S/N weighting). The left panel shows the observed-frame spectra, while the right panel shows the rest-frame one.
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