\begin{table}%t2
%\centering
\par
\caption{Average abundances obtained at two effective temperature points.}\label{tab:abund}
\small \begin{tabular}{cccccccccccc}
\hline\hline\noalign{\smallskip}
&$T_{\rm eff}$ [K]&  $\log{g}$ [cgs] & $\xi$ [$\rm km~s^{-1}$] & $\log{\epsilon_{\rm Mg}}$ & $\sigma_{\rm Mg}$ & $\log{\epsilon_{\rm Ca}}$ &
$\sigma_{\rm Ca}$  & $\log{\epsilon_{\rm Ti}}$         & $\sigma_{\rm Ti}$ & $\log{\epsilon_{\rm Fe}}$ & $\sigma_{\rm Fe}$\\
\hline
& 6250  &  3.96 & 1.86 & 5.37   & 0.10 & 4.31    & 0.06 & 3.03 & 0.05 & 5.09  & 0.07\\
& 5450  &  3.40 & 1.47 & 5.54   & 0.10 & 4.38    & 0.06 & 3.00 & 0.05 & 5.22  & 0.07\\
 \hline
$\Delta$ & 800 &  0.56 & 0.39 & $-$0.17& & $-$0.07 & & 0.03 & & $-$0.13 & \\
\hline
\end{tabular}
\end{table}