\begin{table}%t2
\caption{\label{proplowmetcal}The parameters of the observed stars used for verification of the modeling results at low metallicities.}
\par
%\centering
\par
\begin{tabular}{lllccccc}
\hline\hline \noalign{\smallskip}
star & CaT reference & HR reference & $T_{\rm eff}$ (K) & $\log (g)$ (cm/s$^{2}$)& [Fe/H] HR (dex) & [Fe/H] CaT(new) (dex) \\
\hline
HD 122563 & W. Aoki, priv. comm. & \citet{hond04} & 4570 & 1.1 & --2.77 & --2.66\\
HD 110184 & J. Fulbright, priv. comm. & \citet{fulb00} & 4400 & 0.6 & --2.3 & --2.27\\
HD 88609 & \citet{marr03} & \citet{fulb00} & 4450 & 0.6 & --2.9 & --2.97\\
HD 4306 & J. Fulbright, priv. comm. & \citet{fulb00} & 4800 & 1.7 & --2.8 & --2.57\\
HD 216143 & J. Fulbright, priv. comm. & \citet{fulb00} & 4525 & 1.0 & --2.1 & --2.10\\
CD -38 245 & VLT X-shooter commissioning & \citet{cayr04} & 4800 & 1.5 & --4.2 & --3.82\\
\hline
Boo I 1137 & \citet{norr08} & \citet{norr08} & -- & -- & --3.7 & --3.32 \\
\hline
\end{tabular}
\end{table}