\begin{table}%t2
\par
\caption{Power-law fits to 4 spectra in
  Fig.~\ref{fig4spectra}\label{tabfit1}. The high $\chi^2_\nu$ value
  for the ``PCA high'' spectrum points to the inconsistency with a
  power-law model.}
%\begin{center}
\par
\begin{tabular}{lllll}
\hline\hline
Parameter & PCA low & PCA high & {\it Swift}-XRT & XMM-Newton \\
\hline
Date & 2006--08-21 & 2007-04-10 & 2006-08-11 & 2006-08-31 \\
Bandpass  & 3--20~keV & 3--20 & 0.3--10 & 0.6--10 \\
$N_{\rm H}^\ast$ & 0.51 (fixed) & 0.51 (fixed) & $0.459\pm0.09$ & $0.577\pm0.002$ \\
$Z_{\rm Ne}$ & n/a & n/a & $3.3\pm0.4$ & $1.89\pm0.06$ \\
$\Gamma$ & $2.27\pm0.02$ & 2.48 & $1.93\pm0.03$ & $2.348\pm0.006$ \\
Flux$^\ddag$ & $1.37\pm0.01$ & 4.85 & $5.10\pm0.05$ & $0.887\pm0.003$ \\
$\chi^2_\nu$ ($\nu$) & 0.8851 (37) & 91.0$^\times$ (37) & 1.209 (219) & 1.3451 (1891) \\
\hline
\end{tabular}
%\end{center}
\par
$^\ast$ in units of $10^{22}$~cm$^{-2}$; $^\ddag$2--10~keV absorbed
flux, in 10$^{-10}$~\ecs; $^\times$
the reduced $\chi^2$ is so high
that we refrain from quoting errors on fitted parameters.
\par
\end{table}