\begin{table}%t1
\caption{\label{tab1}Effective temperatures, gravities, and metal abundances observed for $\iota$~Hor (in dex), with the references for the given values are given in Col.~4.}
\small%\centering
\par
\begin{tabular}{cccc}
 \hline
\hline
$T_{\rm eff}$ (K) & log~$g$  & [Fe/H] & Reference \\
 \hline
6136 $\pm$ 34 & 4.47 $\pm$ 0.05 & 0.19 $\pm$ 0.03 & Gonzalez et~al. (2001)\\
6252 $\pm$ 53 & 4.61 $\pm$ 0.16 & 0.26 $\pm$ 0.06 & Santos et~al. (2004)\\
6097 $\pm$ 44 & 4.34 $\pm$ 0.06 & 0.11 $\pm$ 0.03 & Fischer \& Valenti (2005)\\
\hline
\end{tabular}
\end{table}