Fig. 6
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Best-fit values of spectral parameters from fits of high-frequency covariance spectra with the TBabs[deltadisk + nthComp] model. The parameters are plotted as a function of spectral hardness (i.e. the ratio between the 4–12 and the 2–4 keV total count rates). Left panel: spectral slope of the hard Comptonisation component, Γcovar. Right panel: inner disc temperature, kTin,covar.
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