\begin{table}%t4
\caption{\label{tab:tableGX13+1_par}Best-fit parameters of the multi-component model $\mathsf{wabs\cdot(compTB[1]+compTB[2])}$ for the source~GX~13$+$1.}
\par
%\centering
\par
\begin{tabular}{cccc}
\hline\hline \noalign{\smallskip}
Parameter & HR $<$ 10 & 10 $<$ HR $<$ 13 & HR $>$ 13\\
\hline
\multicolumn{4}{c}{$\mathsf{compTB[1]}$ (thermal: $\log A=8$, $\delta=0$)}\\
$kT_{\rm s}$\tablefootmark{a} & $0.2~({<}1.8)$&$0.92^{\rm +0.07}_{0.08}$&$0.89^{\rm +0.07}_{0.08}$\\
$kT_{\rm e}$\tablefootmark{a} &$3^{\rm +0.4}_{-0.3}$&$3.5^{\rm +1.2}_{-0.6}$&$4.2^{\rm +7.5}_{-1.1}$\\
$\alpha$&$1.6^{\rm +0.7}_{-0.5}$&$2.4^{\rm +0.2}_{-0.4}$&$3^{\rm +0.8}_{-0.5}$\\
$\tau$\tablefootmark{d} &3.8&2.4&1.7\\
CAF\tablefootmark{d} &1.8&1.2&1.1\\
\hline
\multicolumn{4}{c}{$\mathsf{compTB[2]}$}\\
$kT_{\rm s}$\tablefootmark{a} &$1.7~({>}0.7)$ & -- & --\\
$R_{\rm bb}$\tablefootmark{b,d} & $2~({<}11)$ & -- & --\\
$kT_{\rm e}$\tablefootmark{a} &$[kT_{\rm e}]$ & -- & --\\
$\alpha$&$[0.78]$&--&--\\
$\delta$&$103~({>}12)$&--&--\\
$\log A$&$-1.3~$($>$$-1.9$)&--&--\\
\hline\noalign{\smallskip}
$L_{\rm tot}$\tablefootmark{c,d} &1.8&0.6&0.5\\
\hline\noalign{\smallskip}
$L_{\rm bb}$\tablefootmark{c,d} &0.03&--&--\\
&(1.7$\%$)&--&--\\
\hline\noalign{\smallskip}
$\chi^2/{\rm d.o.f.}$&14/20&32/19&22/19\\
\hline
\end{tabular}
\tablefoot {Errors are computed at 90$\%$ confidence level for a single parameter.
\tablefoottext{a}{In~keV;}
\tablefoottext{b}{in~km;}
\tablefoottext{c}{in units of $10^{38}$~erg~s$^{-1}$, in the 0.1$-$200~keV energy range;}
\tablefoottext{d}{computed as reported in~Sect.~\ref{other}.}}
\end{table}