\begin{table}%t2
\caption{\label{chi2}$\chi^2$ values for different models used in our full spectral fitting.}
%\centerline
{\small
\begin{tabular}{llll}
\hline
\hline
       & EP~Lyr & HD~52961 & model description \\   
       &  $  \chi^2$  &  $\chi^2$  & \\
\hline
model1 &  21.7   & 129.4     & Mie - 0.1--2.0~$\mu$m - $x=0.5$    \\
model2 &  6.2  &  67.5  & DHS - 0.1--1.5~$\mu$m - $x=0.5$    \\  
model3 &  6.2  &  63.8  & DHS - 0.1--1.5~$\mu$m - $x=1.0$    \\   
model4 &  8.4  &  101.4  & DHS - 1.5--3.0~$\mu$m - $x=0.5$    \\  
model5 &  8.6  &  140.8  & DHS - 1.5--3.0~$\mu$m - $x=1.0$    \\  
model6 &  5.9   & 64.2      & GRF - 0.1--2.0~$\mu$m - $x=0.5$    \\
model7 &  6.3   & 50.0      & GRF - 0.1--2.0~$\mu$m - $x=1.0$    \\
model8 &  5.8   & 96.5      & GRF - 2.0--4.0~$\mu$m - $x=0.5$    \\
model9 &  5.4   & 72.2      & GRF - 2.0--4.0~$\mu$m - $x=1.0$    \\
\hline
\end{tabular}}
\medskip
\par
Note: For each model we give the used dust approximation, grain size and Mg-Fe content in the amorphous grains. $x=1.0$ denotes pure Mg-rich amorphous dust, $x=0.5$ the more standard Mg-Fe amorphous silicates.
\end{table}