\begin{table}%t2
\caption {\label{radvel}Heliocentric radial velocities measurements and their 1$\sigma$ errors
($V_{\rm r} \pm \delta V_{\rm r}$)$_{\rm here}$ for each program star.}             
%\centerline
 {\begin{tabular}{l l c c c c}     
\hline\hline 
\noalign{\smallskip}      
Cluster  & Star & $(V_{\rm r}\pm\delta V_{\rm r})_{\rm here}$ & $(V_{\rm r}\pm\sigma V_{\rm r})_{\rm lit}$ \\
         &      &(km~s$^{-1}$)       &(km~s$^{-1}$) \\
\hline           
Cr~110   & 2108 &   44.47 $\pm$ 0.54 & $45\pm8$\tablefootmark{a} \\  
         & 2129 &   38.74 $\pm$ 0.64 & $45\pm8$$^a$ \\  
         & 3144 &   37.81 $\pm$ 0.69 & $45\pm8$$^a$ \\  
NGC~2099 (M~37)
         & 067  &    8.79 $\pm$ 0.10 &   8.04 $\pm$ 0.19\tablefootmark{b}     \\
         & 148  &    9.05 $\pm$ 0.36 &   8.73 $\pm$ 0.19$^b$ \\  
         & 508  &    9.40 $\pm$ 0.28 &   8.96 $\pm$ 0.19$^b$ \\  
NGC~2420
         & 041  &   74.23 $\pm$ 0.87 &   79.0 $\pm$ 4.2\tablefootmark{c}  \\
         & 076  &   75.49 $\pm$ 0.41 &   75.7 $\pm$ 8.6$^c$ \\  
         & 174  &   73.66 $\pm$ 1.17 &   68.0 $\pm$ 0.9$^c$ \\  
NGC~2682 (M~67)     
	 &  141 &   35.23 $\pm$ 0.05 &   33.5 $\pm$ 2.3\tablefootmark{d} \\ 
	 &  223 &   34.92 $\pm$ 0.31 &   33.0 $\pm$ 1.1$^d$ \\  
         &  286 &   38.90 $\pm$ 0.46 &   33.2 $\pm$ 2.0$^d$ \\  
NGC~7789 
         & 5237 & --51.06 $\pm$ 0.99 & --57.17 $\pm$ 0.23\tablefootmark{e}  \\
         & 7840 & --49.06 $\pm$ 0.81 & --49.21 $\pm$ 0.28$^e$ \\  
         & 8556 & --53.37 $\pm$ 0.81 & --54.10 $\pm$ 0.32$^e$ \\  
\hline             	  
\end{tabular}}
\par
\tablefoot{Literature
measurements, when available, are also reported with their uncertainties
($V_{\rm r} \pm \delta V_{\rm r}$)$_{\rm lit}$.}
\tablefoottext{a}{Cluster average 
         by \citet{ricardo}, based on 8 stars.}
\tablefoottext{b}{\citet{mer08},
	 superseding \citet{mer96}.}
\tablefoottext{c}{Average of 
	 measurements by \citet{liu87}, \citet{friel89} 
         and \citet{scott95}.}
\tablefoottext{d}{Average 	 of measurements by \citet{mat86}, \citet{pil88}, 
	 \citet{friel89}, \citet{friel93}, \citet{sun92},
	 \citet{scott95},  \citet{melo01}, \citet{yong05},
	 \citet{yad08}.}
\tablefoottext{e}{\citet{gim98a}.}	   
\end{table}