Fig. 4
Examples of fit for the Chandra-LETGS plus NuSTAR spectrum of NGC 5548 during the September 2013 flare. From top to bottom panel: fit residuals when only the continuum is allowed to vary from the values obtained for the average spectrum; fit residuals when only the obscurers covering fraction is allowed to vary from the values obtained for the average spectrum; fit residuals for the final best-fit model. The solid line represents the best-fit model. We rebinned the data for clarity.
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