\begin{table}%t3
\caption{Cluster structural parameters.}\label{tab3}
%\sma\llcenterline
 {
\begin{tabular}{lcccccccc}
\hline\hline
Cluster&$1\arcmin$&$\sigma_{\rm bg}$&$\sigma_0$&$\delta_{\rm c}$&\rc&\rl&\rc&\rl\\
       &(pc)&$\rm(stars~arcmin^{-2})$&$\rm(stars~arcmin^{-2})$&&(\arcmin)&(\arcmin)&(pc)&(pc)\\
 (1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)&(9)\\
\hline
FSR~1716$^\dagger$&0.216&$10.5\pm1.0$&$16.2\pm4.8$&$2.6\pm0.5$&$0.88\pm0.23$&$6.0\pm0.6$&
   $0.19\pm0.05$&$1.3\pm0.2$\\
FSR~1716$^\ddagger$&0.653&$10.5\pm1.0$&$16.2\pm4.8$&$2.6\pm0.5$&$0.88\pm0.23$&$6.0\pm0.6$&
   $0.57\pm0.15$&$3.9\pm0.4$\\
Cz~23   &0.728&$2.8\pm0.1$&$16.5\pm4.7$&$7.0\pm1.7$&$0.49\pm0.04$&$4.9\pm0.7$&$0.36\pm0.08$ 
   &$3.6\pm0.4$\\
\hline
\end{tabular}}
Notes. Column~2: arcmin to parsec scale. King profile is expressed as $\sigma(R)=\sigma_{\rm bg}+\sigma_0/(1+(R/R_{\rm c})^2)$. To minimise degrees of freedom in RDP fits, $\sigma_{\rm bg}$ 
was kept fixed (measured in the respective comparison fields) while $\sigma_0$ and \rc\ were allowed to vary. Column~5: cluster/background density contrast ($\delta_{\rm c}=1+\sigma_0/\sigma_{\rm bg}$), measured in CM-filtered RDPs. Columns~6$-$9, core and cluster radii in angular and absolute units. Parameters of FSR~1716 are derived for the OC~($\dagger$) or GC~($\ddagger$) interpretation (Sect.~\ref{age}).
\end{table}