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Fig. 4.

image

Results of simulations produced by varying the mean value of the input spectral index α1 (labeled as ). The figure shows the interdependence of the following properties: the input spectral index , the derived spectral index , and the percentage of upper limits below 1 GHz. Left panel: dependence of the input spectral index, , on ; middle panel: dependence of the / ratio on the output spectral index, ; and right panel: dependence of the percentage of upper limits below 1 GHz on . The solid lines show the means derived for different bins in the x-axes of their respective plot, while the colored intervals show the 1σ interval for the same bins. The red point shows the values of spectral index α1 before and after correction, and the percentage of upper limits below 1 GHz, as presented in Sect. 5. The dashed lines are the equality lines.

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