\begin{table}%t4
\par
\caption {\label{tab:emds}Emission measure distribution of the target stars.}
%\centerline
 {\begin{tabular}{lrr}
\hline \hline
\noalign{\smallskip}
{log~$T$} & \multicolumn{2}{c}{log~$\int N_{\rm e} N_{\rm H} {\rm d}V$
  (cm$^{-3}$)$^a$} \\
(K) & {AR Psc} & {AY Cet} \\ 
\hline
%----------------
6.0 & 50.40\hfill\hspace{1ex}  & 50.60\hfill\hspace{1ex}  \\
6.1 & 50.70\hfill\hspace{1ex}  & 50.80\hfill\hspace{1ex}  \\
6.2 & $50.90^{\rm +0.10}_{-0.30}$  & $51.10^{\rm +0.20}_{-0.40}$  \\
6.3 & $51.05^{\rm +0.10}_{-0.30}$  & $51.40^{\rm +0.20}_{-0.20}$  \\
6.4 & $51.05^{\rm +0.20}_{-0.30}$  & $51.10^{\rm +0.30}_{-0.20}$  \\
6.5 & $51.20^{\rm +0.10}_{-0.30}$  & $51.55^{\rm +0.30}_{-0.30}$  \\
6.6 & $51.30^{\rm +0.20}_{-0.30}$  & $51.90^{\rm +0.30}_{-0.30}$  \\
6.7 & $51.40^{\rm +0.20}_{-0.30}$  & $52.30^{\rm +0.20}_{-0.30}$  \\
6.8 & $51.70^{\rm +0.20}_{-0.20}$  & $52.85^{\rm +0.20}_{-0.20}$  \\
6.9 & $52.70^{\rm +0.10}_{-0.00}$  & $53.30^{\rm +0.10}_{-0.10}$  \\
7.0 & $52.90^{\rm +0.00}_{-0.10}$  & $53.55^{\rm +0.00}_{-0.00}$  \\
7.1 & $52.40^{\rm +0.20}_{-0.20}$  & $52.40^{\rm +0.15}_{-0.25}$  \\
7.2 & $52.60^{\rm +0.20}_{-0.30}$  & $52.60^{\rm +0.10}_{-0.30}$  \\
7.3 & $52.70^{\rm +0.10}_{-0.30}$  & $52.75^{\rm +0.15}_{-0.15}$  \\
7.4 & $52.50^{\rm +0.10}_{-0.30}$  & $52.70^{\rm +0.30}_{-0.25}$  \\
7.5 & 51.60\hfill\hspace{1ex}  & 52.30\hfill\hspace{1ex} \\
%---------------
\hline
\end{tabular}}
\par
\smallskip
$^a$ Emission measure, where $N_{\rm e}$ 
and $N_{\rm H}$ are electron and hydrogen densities, in~cm$^{-3}$. Error bars provided are not independent
between the different temperatures, see text.
%\vspace{-3mm}
\end{table}