Ratio of the TGSS source (total) flux density over the peak flux a function of peak flux signal-to-noise (SNR). The unresolved source distribution is characterized by a median (dashed black line) slightly above unity and −2 sigma deviations (black dots, measured in logarithmic bins) that increase with lower peak SNR, which is compatible with the effects of smearing (see text). The large scatter in the upper part of the plot are resolved sources, that can be separated from the unresolved sources by the +2 sigma line (dashed red line) based on a model fit (dashed blue line) to the −2 sigma deviations.
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