\begin{table}%t1
%\centering
\par
 \caption{Observations and fit results for AA Tau from EPIC data, exposure times (ks) denote both the total and the filtered exposures for MOS and pn. $L_{\rm X}$ (obs./emitted) are given in the 0.2--10.0~keV band. Units are $N_{\rm H}$ in $10^{22}$~cm$^{-2}$, {\it kT} in keV, {\it EM} in $10^{52}$~cm$^{-3}$, and $L_{\rm X}$ in $10^{30}$~erg~s$^{-1}$.}\label{res1}
\begin{tabular}{llrrrrr}
\hline\hline\noalign{\smallskip}
Date & Exposure     & $N_{\rm H}$  &  {\it kT} & {\it EM} & $L_{\rm X}$&$\chi^2$ (d.o.f.)\\
\hline\noalign{\smallskip}
2/14 & 17/16/12& $\rm 0.99^{+ 0.13}_{- 0.12}$ & $\rm 2.38^{+ 0.41}_{- 0.15}$ & $\rm 9.0^{+ 1.3}_{- 1.2}$ & 0.48/1.11   & 68.7 (73)\\[.5mm] 
2/16 & 17/16/12& $\rm 1.70^{+ 0.05}_{- 0.05}$ & $\rm 3.86^{+ 0.19}_{- 0.18}$ & $\rm 141.4^{+ 5.4}_{- 5.3}$ & 9.64/20.8 & 835 (801)\\[.5mm] 
2/18 & 17/13/9& $\rm 1.41^{+ 0.27}_{- 0.30}$ & $\rm 2.07^{+ 0.69}_{- 0.36}$ & $\rm 10.2^{+ 2.4}_{- 2.4}$ & 0.42/1.20   & 44.0 (42)\\[.5mm] 
2/20 & 17/16/11& $\rm 1.29^{+ 0.29}_{- 0.32}$ & $\rm 2.08^{+ 0.94}_{- 0.49}$ & $\rm 6.3^{+ 2.0}_{- 1.7}$ & 0.28/0.73   & 42.1 (36)\\[.5mm] 
2/22 & 20/17/9& $\rm 0.90^{+ 0.46}_{- 0.43}$ & $\rm 1.83^{+ 0.82}_{- 0.44}$ & $\rm 3.5^{+ 1.5}_{- 1.1}$ & 0.15/0.40    & 22.6 (21)\\[.5mm] 
2/24 & 19/16/10& $\rm 1.73^{+ 0.30}_{- 0.27}$ & $\rm 3.42^{+ 0.51}_{- 0.64}$ & $\rm 9.0^{+ 2.1}_{- 1.6}$ & 0.55/1.27   & 50.2 (58)\\[.5mm] 
2/26 & 17/14/7& $\rm 1.16^{+ 0.11}_{- 0.10}$ & $\rm 3.89^{+ 0.66}_{- 0.51}$ & $\rm 21.6^{+ 2.1}_{- 2.0}$ & 1.64/3.18   & 139 (134)\\[.5mm] 
2/28 & 17/13/8& $\rm 1.33^{+ 0.20}_{- 0.36}$ & $\rm 2.43^{+ 0.81}_{- 0.49}$ & $\rm 9.3^{+ 2.7}_{- 2.2}$ & 0.48/1.16    & 30.3 (41)\\[.5mm] 
\hline
\end{tabular}
\end{table}