Fig. 3.
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Fractional variability spectra for the XMM-Newton EPIC-pn observations of IC 4329A as in Table 1. The spectra of this campaign are characterized by a mostly flat shape, with a fractional variability that never exceeds 5%. The dot-dashed black lines are the linear regressions, and the shaded regions represent the combined 3σ error on the slope and normalization.
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