Fig. 8
FWHMCIV of the entire emission line profile as a function of 
for the WISSH sample, compared to PG QSOs from Baskin & Laor (2005) and Tang et al. (2012; green diamonds), WLQs from Plotkin et al. (2015; orange circles), SDSS QSOs from Shen (2016) and Coatman et al. (2016: magenta squares and purple triangles respectively), and HE QSOs from Sulentic et al. (2017; top) and FWHM(CIV) of the outflow component (bottom) as a function of
for the WISSH sample. The black solid line indicates the best linear fits to the data and the purple dashed lines correspond to the 68% confidence interval.
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