\begin{table}%t1
\caption{Best fit parameters for the IT effect on the catalogue presented in this paper. The first~line, in bold face, refers to the entire catalogue, while the following lines refers to Seyfert galaxies~(S), Quasars~(Q), Broad-line objects~(B) and Narrow-line objects~(N). Correlations with Eddington ratio~(LD/C: luminosity-dependent or constant X-ray bolometric correction), BH~mass and redshift follow.}\label{fit}
\small%\centerline
{
\begin{tabular}{lllllllll}
\hline \hline
{T} & {M} & {U} & {A} & $\sigma_{\rm A}$ &  {B} & $ \sigma_{\rm B}$ & $ {\rho}$ & {P} \\ 
(1) & (2) & (3) & (4) & (5) & (6) & (7) & (8) & (9) \\
\hline
\multicolumn{9}{c}{IT effect: $\log(EW) = A + B\log(L_{\rm X,44})$}\\\hline
\textbf{157} & \textbf{81} & \textbf{76} & \textbf{1.73} & \textbf{0.03} & \textbf{--0.17} & \textbf{0.03} & \textbf{--0.33} & $\mathbf{4\times10^{-5}}$ \\
79 (S) & 53 & 26 & 1.73 & 0.06 & --0.16 & 0.06 & --0.25 & 0.04 \\
78 (Q) & 28 & 50 & 1.75 & 0.06 & --0.19 & 0.06 & --0.28 & 0.02 \\ 
62 (B) & 43 & 19 & 1.72 & 0.05 & --0.21 & 0.06 & --0.42 & 0.001 \\
38 (N) & 19 & 19 & 1.63 & 0.09 & --0.21 & 0.08 & --0.34 & 0.07 \\
\hline
\multicolumn{9}{c}{$EW$ vs. Eddington ratio: $\log(EW) = A + B\log(L_{\rm bol}/L_{\rm edd})$}\\\hline
82 (LD) & 50 & 32 & 1.61 & 0.05 & --0.19 & 0.05 & --0.38 & $6\times10^{-4}$ \\
82 (C) & 50 & 32 & 1.64 & 0.05 & --0.16 & 0.06 & --0.26 & 0.03 \\
\hline
\multicolumn{9}{c}{$EW$ vs. BH mass: $\log(EW) = A + B\log(M_{\rm BH,8})$}\\\hline
82 & 50 & 32 & 1.73 & 0.04 & --0.07 & 0.04 & --0.15 & 0.3 \\
\hline
\multicolumn{9}{c}{$EW$ vs. $z$: $\log(EW) = A + B\log(z)$}\\
157 & 81 & 76 & 1.63 & 0.06 & --0.13 & 0.04 & --0.16 & 0.08 \\
\hline
\multicolumn{9}{c}{Ratio$_{\rm Fe}$ vs. X-ray luminosity: $\log({\rm Ratio}_{\rm Fe}) = A + B\log(L_{\rm X,44})$}\\\hline
81 & 52 & 29 & 0.12 & 0.06 & 0.09 & 0.06 & 0.12 & 0.3 \\
\hline
\end{tabular}}
\medskip 
Notes: Cols.~(1)--(3) Total number of points, measures and $y$ upper limits; Cols.~(4)--(7) Best fit parameter and errors for the linear fit $\log(y) = A + B\log(x)$; Cols.~(8), (9) Mean Spearman's rank coefficient and Null Hypothesis probability. See Appendix~\ref{appa} for details.
\end{table}