\begin{table}%T1
\caption{\label{comp}Parameters of M~3/V~9 and UW Gru.}
%\centerline
{
\begin{tabular}{lcccc}
\hline\hline
\noalign{\smallskip}
                       & UW Gru & Ref. & M~3/V~9& Ref.\\
\noalign{\smallskip}
\hline
 \noalign{\smallskip}
 period [d]                          &  0.5482104       &     & 0.5415552   &   \\
${\langle B-V\rangle}$ [mag]  &   0.36          & 1   &   0.33, 0.39     & 2, 3 \\
$E(B-V)$ [mag]                       &  $0.10$      & 1   &   0.01& 4 \\ 
${\rm [Fe/H]_{phot}}$ [dex]            & $-1.51 $         &     & $ -1.53$    &   \\
${\rm [Fe/H]_{spect}}$ [dex]           & $-1.68$, $-1.41$ & 5, 6 &$ -0.87$     & 7 \\  
\noalign{\smallskip}
\hline
\end{tabular}}
\smallskip
1) Bernard (\cite{bern}); 2) Benk\H o et~al. (\cite{bj}); 3) Corwin \& Carney (\cite{cc01}); 4) 
Harris (\cite{h96}); 5) Layden (\cite{layden}); 6) Jurcsik \& Kov\'acs (\cite{jk96}); 7)~Sandstrom et~al. (\cite{s01}).  
\end{table}