\begin{table}%t4
\caption{\label{tab4}Structural parameters.}
\par
\small%\centerline
 {
\begin{tabular}{lrrrrrrrrrrr}
\hline\hline \noalign{\smallskip}
Cluster&$(1')$&$\sigma_{0K}$&$\sigma_{\rm bg}$&$R_{\rm core}$&$R_{\rm RDP}$&$\sigma_{0K}$&$\sigma_{\rm bg}$&$R_{\rm core}$&$R_{\rm RDP}$&${\Delta}R$&CC\\
&(pc)&($\rm *~pc^{-2}$)&($\rm *~pc^{-2}$)&(pc)&(pc)&($*~\arcmin^{-2}$)&($*~\arcmin^{-2}$)&($\arcmin$)&($\arcmin$)&($\arcmin$)& \\
 ($1$)&($2$)&($3$)&($4$)&($5$)&($6$)&($7$)&($8$)&($9$)&($10$)&($11$)&($12$)\\
\hline
Be~63&$1.64$&$4.2\pm1.5$&$0.4\pm0.01$&$0.6\pm0.1$&$8.2\pm3.2$&$11.5\pm4.0$&$1.2\pm0.02$&$0.38\pm0.08$&$5.0\pm2.0$&$15{-}30$&0.92\\
Be~84 &$0.50$&$21.9\pm6.9$&$10.6\pm0.1$&$0.4\pm0.1$&$4.5\pm1.0$&$5.5\pm1.7$&$2.6\pm0.02$&$0.2\pm0.1$&$2.2\pm1.0$&$15{-}30$&0.89\\
Cz~6&$0.81$&$21.8\pm12.0$&$1.85\pm0.05$&$0.37\pm0.2$&$4.0\pm1.2$&$14.2\pm7.8$&$1.2\pm0.03$&$0.46\pm0.2$&$5.0\pm1.5$&$10{-}20$&0.90\\
Cz~7&$0.95$&$6.8\pm1.6$&$0.9\pm0.02$&$0.5\pm0.08$&$5.2\pm1.0$&$6.28\pm1.5$&$0.8\pm0.02$&$0.53\pm0.09$&$5.5\pm2.0$&$10{-}30$&0.95\\
Cz~12&$0.57$&$35.8\pm12.6$&$3.98\pm0.06$&$0.27\pm0.08$&$2.9\pm1.0$&$11.8\pm4.13$&$1.31\pm0.02$&$0.5\pm0.2$&$5.0\pm2.0$&$10{-}20$&0.88\\
Ru~141&$0.53$&$2.6\pm1.4$&$0.9\pm0.1$&$1.6\pm0.6$&$7.6\pm1.0$&$0.7\pm0.4$&$0.25\pm0.02$&$3.0\pm1.2$&$14.5\pm2.0$&$10{-}20$&0.85\\
Ru~144 &$0.47$&$23.8\pm6.8$&$9.0\pm0.4$&$0.9\pm0.2$&$5.6\pm1.0$&$5.3\pm1.5$&$2.0\pm0.08$&$1.95\pm0.36$&$12.0\pm2.0$&$12{-}20$&0.97\\
Ru~172 &$0.89$&$17.7\pm3.7$&$6.3\pm0.06$&$0.6\pm0.08$&$6.1\pm1.0$&$14.2\pm3.0$&$6.3\pm0.06$&$0.7\pm0.1$&$6.8\pm1.0$&$8{-}20$&0.96\\
FSR~101 &$0.54$&$79.7\pm21.3$&$10.8\pm0.4$&$0.28\pm0.04$&$2.2\pm0.5$&$23.5\pm6.3\pm$&$3.2\pm0.1$&$0.52\pm0.09$&$4.0\pm1.0$&$8{-}20$&0.97\\
FSR~1430 &$1.05$&$11.9\pm5.0$&$1.5\pm0.05$&$1.0\pm0.25$&$7.4\pm2.1$&$13.0\pm5.4$&$1.7\pm0.05$&$0.95\pm0.24$&$7.0\pm2.0$&$20{-}40$&0.87\\
FSR~1471 &$0.78$&$9.9\pm4.95$&$1.6\pm0.05$&$0.42\pm0.16$&$5.5\pm1.6$&$6.1\pm3.0$&$0.97\pm0.03$&$0.53\pm0.2$&$7.0\pm2.0$&$20{-}40$&0.80\\
FSR~162 &$2.05$&$1.55\pm0.6$&$1.3\pm0.01$&$1.88\pm0.6$&$11.27\pm3.0$&$6.54\pm2.5$&$5.5\pm0.05$&$0.92\pm0.3$&$5.5\pm1.5$&$15{-}30$&0.88\\
FSR~178 &$1.07$&$17.9\pm5.0$&$3.8\pm0.05$&$0.36\pm0.06$&$3.2\pm1.0$&$20.6\pm5.7$&$4.4\pm0.06$&$0.34\pm0.06$&$3.0\pm0.5$&$10{-}20$&0.97\\
FSR~198 &$0.49$&$30.7\pm5.6$&$29.2\pm0.2$&$0.7\pm0.1$&$3.43\pm1.0$&$7.6\pm1.4$&$7.2\pm0.06$&$1.5\pm0.2$&$7.0\pm2$&$15{-}30$&0.98\\
\hline
\end{tabular}}
\medskip
Notes. Column~2: arcmin to parsec scale. To minimise degrees of freedom in RDP fits with the King-like profile (see text), $\sigma_{\rm bg}$ was kept fixed (measured in the respective comparison fields) while $\sigma_{0}$ and $R_{\rm core}$ were allowed to vary. Column~11: comparison field ring. Column~12: correlation coefficient.
\end{table}