\begin{table}%t3
       \caption{\label{Xray_results}Spectral information from X-ray observations of H~2356--309. }
     %\centering
\par
      \begin{tabular}{lcccccccc}
       \hline\hline
            \noalign{\smallskip}
Instrument & MJD  &  Model & $\Gamma_1$ & $E_{\rm break}$    & $ 
\Gamma_2$ &$F_{0.1-2.0~\rm keV}$  & $F_{2-10~\rm keV}$ & $\chi^2_{\rm r}$,~NDF\tablefootmark{a}\\
            \noalign{\smallskip}
          &       &         &    & [keV]  &   &  \multicolumn{2}{c}{[$10^{-12}$ erg cm$^{-2}$ s$^{-1}$]\tablefootmark{b}} &  \\
            \noalign{\smallskip}
	     \hline
            \noalign{\smallskip}
BeppoSAX & 51~350--51 & BPL & $\rm 0.78^{+0.06}_{-0.07}$ & $1.8 \pm 0.4$ &  
$1.10 \pm 0.04$ & -- & 25 & --\\
RXTE & 53~320 & PL & $2.43 \pm 0.25$ & -- & -- & -- & $\rm 9.70^{+0.3}_ 
{-1.3}$ & --\\
            \noalign{\smallskip}
\hline
            \noalign{\smallskip}
XMM-Newton\tablefootmark{c} & 53~534 & PL & $2.23 \pm 0.01$ & --    &  --   & 25.9 & 8.05 &  1.41,~541\\
    &      & BPL & $2.08 \pm 0.03$ & $1.00 \pm 0.08$ &  $2.32 \pm 0.02$ &  23.2 & 7.46 & 0.95,~539 \\
            \noalign{\smallskip}
XMM-Newton$^{c}$ & 53~536 & PL    & $2.16 \pm 0.01$ & --  &  --  & 25.9 & 9.54 &  1.52,~541\\
    &       & BPL & $1.89 \pm 0.10$ & $0.66 \pm 0.14$ &  $2.20 \pm 0.02$ &  22.3 & 9.15 & 1.21,~539\\
%XMM  confidence level 90% 1 param (deltachi=2.709)
            \noalign{\smallskip}
       \hline
     \end{tabular}
    \tablefoot{\tablefootmark{a}{The reduced $\chi^2_{\rm r}$ and degrees of freedom (NDF) correspond to fits of either a power-law (PL) function or broken power-law (BPL) function to the XMM-Newton X-ray data.}
    \tablefootmark{b}{The integrated fluxes have the effects of Galactic absorption removed.}
    \tablefootmark{c}{All errors from the XMM-Newton fits are quoted at the 90\% confidence level.}}
  \end{table}