\begin{table}%t2
%\centering
\par
%\renewcommand{\arraystretch}{1.1}
\caption{The spectral parameters as measured separately by \mbox{\XMM{}} and XRT,
fitting the data both separately and together. For this fit, XRT data were
selected from the same time interval covered by the \XMM{} observation. Due to
the limited statistics, $N_{\rm H}$ was frozen to the value derived by \XMM{}
when fitting XRT data. The errors are at 90\% confidence level for a single
parameter of interest.\label{tab:XMM}}
\small\begin{tabular}{lccc}\hline\hline
\noalign{\smallskip}
Instrument  &$N_{\rm H}$ ($10^{21}$ cm$^{-2}$) &$\Gamma$                &$\chi^2_\nu$ ($\chi^2/$d.o.f.) \\ \hline
\noalign{\smallskip}
EPIC        &$\rm 1.3^{+0.1}_{-0.1}$               &$\rm 2.13^{+0.06}_{-0.06}$  &1.17 (222.5/190)               \\
XRT         &1.3 (frozen)                      &$\rm 1.96^{+0.29}_{-0.27}$  &1.43 (11.4/8)                  \\
EPIC + XRT  &$\rm 1.3^{+0.1}_{-0.1}$               &$\rm 2.09^{+0.05}_{-0.08}$  &1.18 (219.7/197)               \\ 
\hline
\end{tabular}
\end{table}