\begin{table}%t5
%\centering
\par
\caption{Sensitivities of abundances
($\log n$(X)) to variations in the atmospheric parameters for 
TO and clump stars in NGC~6253.}\label{sens}
\begin{tabular}{cccc}
\hline
\hline
$\Delta$ &$\sigma_{T\rm{eff}}$ &$\sigma_{\log g}$ &$\sigma_{\xi}$  \\
&$\Delta\mbox{\teff}=\pm70$~K & $\Delta{\log g}=\pm0.25$~dex & $\Delta{\xi} =\pm0.10$~km~s$^{-1}$\\
\hline 
069885 & & & \\
Fe~{\sc i}&$+0.05$/$-0.05$ &$-0.02$/$+0.03$ &$-0.03$/$+0.03$ \\
Na~{\sc i}&$+0.03$/$-0.04$ &$-0.05$/$+0.04$ &$-0.02$/$+0.01$ \\
Mg~{\sc i}&$+0.03$/$-0.03$ &$-0.03$/$+0.03$ &$-0.02$/$+0.02$ \\
Si~{\sc i}&$+0.03$/$-0.02$ &$-0.01$/$+0.02$ &$-0.01$/$+0.02$ \\
Ca~{\sc i}&$+0.05$/$-0.04$ &$-0.05$/$+0.05$ &$-0.03$/$+0.04$ \\
Ti~{\sc i}&$+0.06$/$-0.07$ &$-0.01$/$+0.01$ &$-0.03$/$+0.02$ \\
Cr~{\sc i}&$+0.05$/$-0.05$ &$-0.01$/$+0.02$ &$-0.03$/$+0.03$ \\
Ni~{\sc i}&$+0.05$/$-0.04$ &$0.0$/$+0.01$ &$-0.04$/$+0.03$ \\
Ba~{\sc ii}&$+0.02$/$-0.02$ &$+0.04$/$-0.05$ &$-0.07$/$+0.07$ \\
105495 & & & \\
Fe~{\sc i}&$+0.01$/$+0.03$ &$+0.08$/$-0.01$ & $-0.03$/$+0.07$\\
Na~{\sc i}&$+0.07$/$-0.04$ &$-0.05$/$+0.04$ &$-0.02$/$+0.05$ \\
Mg~{\sc i}&$0.00$/$+0.01$ & $+0.02$/$+0.01$& $-0.03$/$+0.04$ \\
Si~{\sc i}&$-0.05$/$+0.06$& $+0.07$/$-0.02$&  $-0.02$/$+0.03$\\
Ca~{\sc i}&$+0.08$/$-0.05$& $-0.03$/$+0.06$&  $-0.04$/$+0.07$\\
Ti~{\sc i}&$+0.12$/$-0.06$& $+0.03$/$+0.02$&  $-0.05$/$+0.11$\\
Cr~{\sc i}&$+0.08$/$+0.02$ & $+0.03$/$+0.02$&  $-0.05$/$+0.09$\\
Ni~{\sc i}&$+0.01$/$+0.04$ & $+0.09$/$-0.02$&  $-0.04$/$+0.08$\\
Ba~{\sc ii}&$+0.02$/$-0.02$& $+0.05$/$-0.05$&  $-0.06$/$+0.07$\\
\hline
\end{tabular}
\end{table}