\begin{table}%t1
\caption{Effective temperatures, gravities, and metal abundances observed for $\mu$ Arae. [Fe/H] ratios are given in dex.}
\label{tab1}
%\centering
\par
\begin{tabular}{cccc} \hline
\hline\noalign{\smallskip}
$T_{\rm eff}  (K)$ & log $g$         & [Fe/H]        & Reference \\
 \hline
5800~$\pm$~100        & 4.30~$\pm$~0.10 & 0.32~$\pm$~0.10 & Bensby et~al. (\cite{bensby03})\\
5811~$\pm$~45         & 4.42~$\pm$~0.06 & 0.28~$\pm$~0.03 & Laws et~al. (\cite{laws03})\\
5798~$\pm$~33         & 4.31~$\pm$~0.08 & 0.32~$\pm$~0.04 & Santos et~al. (\cite{santos04a})\\
5813~$\pm$~40         & 4.25~$\pm$~0.07 & 0.32~$\pm$~0.05 & Santos et~al. (\cite{santos04b})\\
5784~$\pm$~44         & 4.30~$\pm$~0.06 & 0.29~$\pm$~0.03 & Fischer \& Valenti (\cite{fischer05})\\
\hline
\end{tabular}
\end{table}