\begin{table}%t4
 \caption{{X-ray spectral parameters of OFS with a
 spectroscopic redshift in the CDF-S.}\label{table:optfaintS_xray} }
%\begin{center}
{\begin{tabular}{rcccccc}
\hline 
\hline 
\small{XID$^{a}$} & \small{CXO CDFS$^{b}$} & \small{counts$^c$} & 
 \small{$\Gamma ^d$} & \small{$N_{\rm H}^{e}$} &
 \small{$L_{\rm X}^{f}$} & \small{cstat$^g$} \\ 
\hline
\noalign{\smallskip}
\small{45} & \small{J033225.8$-$274306} & \small{$302\pm18$}  & \small{$\rm 1.46^{1.68}_{1.26}$} & \small{$\rm 22.91^{23.05}_{22.74}$} & \small{$1.51 \times 10^{44}$} & \small{150.7}\\
\small{54} & \small{J033214.7$-$275422} & \small{$186\pm17$} & \small{$\rm 1.38^{1.72}_{1.10}$} & \small{$\rm 23.03^{23.21}_{22.79}$} & \small{$1.18 \times 10^{44}$} & \small{153.8}\\
\small{117} & \small{J033203.1$-$274450} & \small{$136\pm15$} & \small{1.8} & \small{$\rm 22.49^{22.70}_{22.16}$} & \small{$9.72 \times 10^{43}$} & \small{126.4}\\
\small{263} & \small{J033218.9$-$275136} & \small{$46\pm9$} & \small{$\rm 1.75^{2.10}_{1.40}$} & \small{$>$24.18} & \small{$3.48 \times 10^{44}$} & \small{60.1}\\
\small{265} & \small{J033233.4$-$274236} & \small{$114\pm14$} & \small{1.8} & \small{$\rm 23.20^{23.27}_{23.13}$} & \small{$5.00 \times 10^{43}$} & \small{107.9}\\
\small{606} & \small{J033225.0$-$275009} & \small{$33\pm8$} & \small{1.8} & \small{$\rm 23.27^{23.40}_{23.14}$} & \small{$1.45 \times 10^{43}$} & \small{59.9}\\
\hline 
\end{tabular} }

{$^a$ XID from Giacconi et~al. (\cite{giacconi02}).}\\ 
{$^b$ IAU registered name, based on original X-ray coordinates.}\\ 
{$^c$ Net counts in the [0.5--10] keV band.}\\
{$^d$ Spectral Index and 90\% confidence range (Tozzi et~al. 2005).}\\
{$^e$ Logaritm of the intrinsic absorption (and 90\% confidence range) 
(Tozzi et~al. 2005). }\\
{$^f$ X-ray luminosity in [0.5--10] keV band, deabsorbed and in erg s$^{-1}$ 
(Tozzi et~al. 2005).}\\
{$^g$ C-statistic coefficient from the model fitting.}
%\end{center}
\par
\end{table}