Table 6: Structural parameters measured in the RDPs built with colour-magnitude filtered photometry.
      RDP
Cluster $1\hbox{$^\prime$ }$   $\sigma_{bg}$ $\sigma_0$ $\delta_c$ $ R_{\rm core}$ $ R_{\rm RDP}$ $ R_{\rm core}$ $ R_{\rm RDP}$
  (pc)   $\rm (stars~pc^{-2})$ $\rm (stars~pc^{-2})$   (pc) (pc) ($^\prime$) ($^\prime$)
(1) (2)   (3) (4) (5) (6) (7) (8) (9)
Be 23 1.931   $0.6\pm0.1$ $4.1\pm1.2$ $8.3\pm2.2$ $1.1\pm0.3$ $10.0\pm2.0$ $0.55\pm0.15$ $5.2\pm1.0$
Be 69 1.000   $1.9\pm0.1$ $14.0\pm3.9$ $8.5\pm2.1$ $0.8\pm0.2$ $5.1\pm0.2$ $0.80\pm0.16$ $5.1\pm0.2$
Be 71 0.862   $5.5\pm0.1$ $15.5\pm4.7$ $3.8\pm0.8$ $0.8\pm0.2$ $4.9\pm0.2$ $0.92\pm0.21$ $5.7\pm0.2$
Cz 23 0.728   $5.2\pm0.1$ $31.1\pm9.0$ $7.0\pm1.7$ $0.4\pm0.1$ $3.6\pm0.1$ $0.49\pm0.04$ $4.9\pm0.7$
NGC 1798 1.731   $1.2\pm0.1$ $5.6\pm1.9$ $5.5\pm1.5$ $1.4\pm0.4$ $13.0\pm2.0$ $0.82\pm0.21$ $7.5\pm1.1$
NGC 1883 1.083   $1.8\pm0.1$ $13.6\pm3.1$ $8.5\pm1.7$ $0.9\pm0.1$ $10.0\pm1.0$ $0.82\pm0.13$ $9.2\pm1.1$
NGC 2126 0.298   $11.8\pm0.2$ $49.6\pm17.0$ $5.2\pm1.4$ $0.4\pm0.1$ $3.5\pm0.5$ $1.34\pm0.33$ $11.7\pm1.7$
FSR 756 0.521   $2.9\pm0.1$ $36.0\pm17.0$ $13.5\pm5.9$ $0.2\pm0.1$ $2.2\pm0.3$ $0.31\pm0.19$ $4.2\pm0.6$
FSR 814 0.475   $16.5\pm0.2$ $22.6\pm10.2$ $2.4\pm0.6$ $0.6\pm0.2$ $2.5\pm0.2$ $1.24\pm0.44$ $5.3\pm0.4$
FSR 869 1.232   $2.3\pm0.1$ $5.6\pm2.9$ $3.5\pm1.3$ $0.7\pm0.3$ $6.2\pm1.0$ $0.54\pm0.27$ $5.0\pm0.2$
FSR 923 0.447   $15.6\pm0.2$ $26.1\pm13.0$ $2.7\pm0.8$ $0.5\pm0.2$ $4.0\pm1.0$ $1.12\pm0.42$ $8.9\pm0.5$
FSR 932 0.444   $15.8\pm0.2$ $45.1\pm15.2$ $3.9\pm1.0$ $0.4\pm0.1$ $3.0\pm0.5$ $0.79\pm0.20$ $6.7\pm1.1$
FSR 942 0.900   $2.8\pm0.1$ $9.9\pm2.5$ $4.6\pm0.9$ $1.1\pm0.2$ $8.0\pm1.5$ $1.25\pm0.24$ $8.9\pm1.7$
FSR 948 0.831   $3.3\pm0.1$ $10.2\pm5.1$ $4.1\pm1.6$ $0.4\pm0.2$ $4.2\pm0.5$ $0.50\pm0.34$ $5.0\pm0.4$
FSR 974 0.748   $6.0\pm0.1$ $11.1\pm6.0$ $3.0\pm1.2$ $0.5\pm0.3$ $9.0\pm1.0$ $0.71\pm0.39$ $12.0\pm2.0$
$(\dagger)$: FSR 1644; $(\ddagger)$: FSR 1723. 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 5: cluster/background density contrast ( $\delta_{\rm c}=1+\sigma_0/\sigma_{\rm bg}$), measured in colour-magnitude filtered RDPs.

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