\begin{table}%t9
%\centering
\par
\caption{\label{dbg_variances}Variability estimators (definitions in Sect.~\ref{fvar}) relative to $\ln \Phi$ both for the ``quiescent'' and flaring regime, as defined in Sect.~\ref{QuiescentStateDistrib}.}
\begin{tabular}{c c c}
\hline \hline \noalign{\smallskip}
 & ``Quiescent'' regime & Flaring regime \\ 
 \hline\\[-3mm]
 $\sigma^2_{\rm exp} \: \mbox{of} \: \ln \Phi$ & 0.304 $\pm$ 0.040 & 1.78 $\pm$  0.27 \\
$\sigma^2_{\rm err} \: \mbox{of} \: \ln \Phi$ & 0.169 $\pm$ 0.053 & 0.022 $\pm$  0.005 \\
$\sigma^2_{\rm xs} \: \mbox{of} \: \ln \Phi$ & 0.135 $\pm$ 0.067 & 1.758 $\pm$ 0.273  \\
\hline
\end{tabular}
\tablefoot {Experimental variance (line 1), error contribution to the variance (line~2), and excess variance (line~3). The latter is directly comparable to~$F_{\rm var}^2$.}
\end{table}