\begin{table}%t1
\caption{General data on M~52 and NGC~3960.}\label{tab1}
\small%\centerline
{
\begin{tabular}{lccccccccccccccc}
\hline\hline
&\multicolumn{5}{c}{WEBDA}&\multicolumn{9}{c}{Present work}\\
\cline{2-6}\cline{8-16}
Cluster&$\alpha(2000)$&$\delta(2000)$&Age&\ebv&\ds&&$\alpha(2000)$&$\delta(2000)$&$\ell$&$b$&Age&$\ebv_{\rm O}$&\ds&\dgc&\dgc \\
&(hms)&($^\circ\arcmin\arcsec$)&(Myr)&&(kpc)&&(hms)&($^\circ\arcmin\arcsec$)&($^\circ$)&($^\circ$)&(Myr)&&(kpc)&(kpc)&(kpc)\\
(1)&(2)&(3)&(4)&(5)&(6)&&(7)&(8)&(9)&(10)&(11)&(12)&(13)&(14)&(15)\\
\hline
\noalign{\smallskip}
M~52&23:24:31&$+$61:35:29    &58&0.65&1.42&&23:24:42&$+$61:35:42&112.81&$+0.44$&$60\pm10$&$\rm 0.58^{0.93}_{0.50}$&1.4&8.7&7.9\\
NGC~3960&11:50:33&$-$55:40:24&664&0.30&2.26&&11:50:38.9&$-$55:40:48&294.38&$+6.18$&$1100\pm100$&$\rm 0.13^{0.34}_{0.03}$&1.7&7.5&6.7\\
\hline
\end{tabular}}
\medskip
Notes. $\ebv\rm_O$ is the colour excess of the cluster's central region (Sect.~\ref{age}), while the bounds refer to the range of reddening throughout the cluster field. Uncertainty in~$\ebv\rm_O$ is of the order of~$\pm$$0.05$. Column~14: \dgc\ calculated using $R\rm_O=8.0$~kpc (Reid \cite{Reid93}) as the distance of the Sun to the Galactic center. Column~15: \dgc\ using $R\rm_O=7.2$~kpc (Bica et~al. \cite{BBBO06}). Uncertainties in \ds\ and~\dgc\ are of the order of~$\pm$$0.2$~kpc.
\end{table}