\begin{table}%t3
    \caption{Best fit spectral parameters for all the sources
      listed in Table~\ref{tab:all} which are likely extra-galactic.
      The spectra were fit by an absorbed power-law model. $P$ is the
      probability level for the fit.}  
%%%\centering
\par
    \begin{tabular}{c|ccccl}
\hline  \hline
Source  & $N({\rm H})$ & Spectral index & $\chi^2$ & $P$ & Notes\\
~       & $10^{22}~{\rm cm^{-2}}$ & $\gamma$ & ~ & ~ & ~\\
\hline
 4 & 0.49 $\pm$ 0.17 & 1.7 $\pm$ 0.3 & 1.25 & 0.25 & {\small 1T fit equivalent ($kT=8.2$)
 -- no  counterpart}\\
 5 & 0.23 $\pm$ 0.14 & 2.6 $\pm$ 0.7 & 1.14 & 0.30 & {\small 1T fit
 equivalent ($kT=2.2$) -- no counterpart}\\
 8 & 0.79 $\pm$ 0.55 & 2.1 $\pm$ 0.8 & 0.75 & 0.74 & {\small 1T fit
 equivalent ($kT=1.9$) -- no  counterpart}\\
 9 & 0.58 $\pm$ 0.31 & 3.7 $\pm$ 1.3 & 0.52 & 0.92 & {\small 1T fit
 equivalent ($kT=0.9$) -- no  counterpart}\\
10 & 1.65 $\pm$ 1.02 & 1.1 $\pm$ 0.5 & 1.32 & 0.16 & {\small 1T fit
unacceptable -- see text}\\
11 & 0.33 $\pm$ 0.21 & 1.6 $\pm$ 0.5 & 0.94 & 0.51 & {\small 1T fit
equivalent ($kT=6.6$) -- no  counterpart}\\
12 & 0.14 $\pm$ 0.16 & 1.2 $\pm$ 0.4 & 0.72 & 0.70 & {\small 1T fit
equivalent ($kT=44$) -- radio source [SB86] L1551 3}\\
15 & --  & --           & --    & --    & {\small no fit possible,
very hard spectrum -- no counterpart}\\
16 & 1.89 $\pm$ 1.24 & 1.6 $\pm$ 0.7 & 0.92 & 0.55 & {\small 1T fit
unacceptable -- radio source [SB86] L1551 2}\\
17 & 0.30 $\pm$ 0.16 & 1.0 $\pm$ 0.2 & 0.86 & 0.70 & {\small 1T fit
equivalent ($kT=64$) -- no  counterpart}\\
21 & 2.34 $\pm$ 0.67 & 2.3 $\pm$ 0.5 & 0.40 & 0.94 & {\small 1T fit
equivalent ($kT=3.3$) -- no  counterpart}\\
24 & 4.26 $\pm$ 3.07 & 3.1 $\pm$ 1.8 & 2.40 & 0.02 & {\small 1T fit
equivalent ($kT=2.3$) -- no  counterpart}\\
27 & 1.13 $\pm$ 0.54 & 1.6 $\pm$ 0.5 & 1.10 & 0.36 & {\small 1T fit
equivalent ($kT=20$) -- no  counterpart}\\
\hline
    \end{tabular}
    \label{tab:sindex}
\end{table}