\begin{table}%t3
\caption {\label{fiduciSgr}$V{-}(V{-}I)$ fiducial lines for the globular clusters 
\object{M 54}, \object{Terzan~7}, \object{Terzan 8}, \object{Arp 2}. }
%\centering
\par
\begin{tabular}{llllll}
\hline\hline
\noalign{\smallskip}
$V$    & $V-I$   & $V-I$   & $V-I$   & $V-I$  \\
mag  & \object{M 54} & \object{Ter 7} & \object{Ter 8} & \object{Arp 2} \\
\hline
15.5 & 1.631 &  --   &  --   &  --   \\
16.0 & 1.440 & 1.425 & 1.349 & 1.299 \\
16.5 & 1.340 & 1.294 & 1.222 & 1.215 \\
17.0 & 1.254 & 1.219 & 1.150 & 1.109 \\
17.5 & 1.197 & 1.148 & 1.104 & 1.072 \\
18.0 & 1.145 & 1.067 & 1.064 & 1.019 \\
18.5 & 1.104 & 1.047 & 1.032 & 0.981 \\
19.0 & 1.067 & 0.992 & 0.999 & 0.948 \\
19.5 & 1.049 & 0.958 & 0.978 & 0.927 \\
20.0 & 1.010 & 0.933 & 0.948 & 0.896 \\
20.5 & 1.020 & 0.731 & 0.926 & 0.866 \\
21.0 & 0.806 & 0.660 & 0.755 & 0.781 \\
21.5 & 0.776 & 0.670 & 0.683 & 0.659 \\
22.0 & 0.794 & 0.701 & 0.670 & 0.672 \\
22.5 & 0.832 & 0.758 & 0.732 & 0.715 \\
23.0 & 0.879 & 0.816 & 0.774 & 0.778 \\
23.5 & 0.911 & 0.897 & 0.820 & 0.820 \\
\hline
\end{tabular}
\end{table}