\begin{table}%t4
\caption{Time resolved spectral results for observation E. The table gives the parameters of a blackbody component added to a fixed component with $N_{\rm H}=2.6\times 10^{22}$~$\rm cm^{-2}$, $\Gamma=2$, $k_{\rm B} T=0.4$~keV, and $R_{\rm bb}=7$~km (see  Sect.~\ref{obsE} for details). Errors are given at 1$\sigma$.
\label{fitE}}
%\centerline
 {\begin{tabular}[c] {cccc}
\hline\hline
\noalign{\smallskip}
Time interval & $k_{\rm B} T$ (keV) &  $R_{\rm bb}$$^a$ (km) & $\chi^2_{\rm r}$ (d.o.f.)\\
\hline
I   & $\rm 1.23^{+0.02}_{-0.03}$ & $1.8\pm0.1$    & 1.03 (69)\\
    & 1.1 (fixed)            & $\rm 2.17^{+0.03}_{-0.02}$ & 1.35 (70)\\
    & $1.29\pm0.01$ & 1.6 (fixed)            & 1.09 (70)\\
II  & $\rm 1.15^{+0.03}_{-0.02}$ & $1.6\pm0.1$    & 1.21 (74)\\
    & 1.1 (fixed)            & $\rm 1.77^{+0.02}_{-0.03}$ & 1.24 (75)\\
    & $1.16\pm0.01$ & 1.6 (fixed)            & 1.20 (75)\\
III & $1.16\pm0.04$ & $1.4\pm0.1$    & 0.98 (64)\\
    & 1.1 (fixed)            & $\rm 1.56^{+0.02}_{-0.03}$ & 1.01 (65)\\
    & $1.09\pm0.01$ & 1.6 (fixed)            & 1.04 (65)\\
IV  & $1.10\pm0.05$ & $\rm 1.5^{+0.2}_{-0.1}$    & 1.31 (45)\\
    & 1.1 (fixed)            & $1.50\pm0.03$ & 1.28 (46)\\
    & $1.07\pm0.01$ & 1.6 (fixed)            & 1.29 (46)\\
V   & $0.94\pm0.07$ & $\rm 1.5^{+0.3}_{-0.2}$    & 1.25 (29)\\
    & 1.1 (fixed)            & $1.09\pm0.04$ & 1.35 (30)\\
    & $\rm 0.92^{+0.01}_{-0.02}$ & 1.6 (fixed)            & 1.21 (30)\\
\hline
\end{tabular}}
\par
\smallskip
$^a$  Radius at infinity assuming a distance of 15~kpc. 
\end{table}