Table 4: Results of King's empirical profile fitting to the radial surface density distribution. Columns 1 and 2 give the V magnitude ranges and the corresponding mass ranges; Col. 3 the fitted normalization constant, Col. 4 the assumed tidal radius, Col. 5 the fitted core radius, Col. 6 the $\chi ^2$ of the fitting. Finally, Col. 7 lists the number of counted cluster members in our investigated region for each magnitude subset, while Cols. 8 and 9 are the total number of cluster members predicted by the fitted model within the investigated radius ( $\sim$ 3.7 parsec) and the tidal radius, respectively. The values are given for each of the four step of the adopted iterative procedure.
$\Delta V$ M $\rho_0$ $r_{\rm t}$ $r_{\rm c}$ $\chi ^2$ $N_{\rm sur}^{\rm cl}$ $N_{\rm sur}^{\rm cal}$ $N_{\rm tid}$

$(M_\odot)$ $({\rm stars/arcmin}^2)$ (pc) (pc)

ITERATION 0

8.50-11.13 3.7-1.7 $0.21 \pm 0.10$ 10.36 $0.59 \pm 0.22$ 4.2 34 29 33

11.13-13.75 1.7-1.0 $0.22 \pm 0.13$ 10.36 $1.34 \pm 0.46$ 8.5 88 76 95

13.75-16.38 1.0-0.7 $0.27 \pm 0.24$ 10.36 $1.49 \pm 0.73$ 1.3 106 101 129

16.38-19.00 0.7-0.4 $0.22 \pm 0.26$ 10.36 $2.66 \pm 1.48$ 2.5 119 111 164

ITERATION 1

8.50-11.13 3.7-1.7 $0.21 \pm 0.10$ 10.57 $0.62 \pm 0.23$ 4.0 35 30 34

11.13-13.75 1.7-1.0 $0.23 \pm 0.13$ 10.57 $1.36 \pm 0.44$ 8.7 93 81 103

13.75-16.38 1.0-0.7 $0.27 \pm 0.24$ 10.57 $1.55 \pm 0.74$ 1.3 113 108 140

16.38-19.00 0.7-0.4 $0.24 \pm 0.25$ 10.57 $2.65 \pm 1.30$ 2.5 134 124 185

ITERATION 2

8.50-11.13 3.7-1.7 $0.21 \pm 0.10$ 10.60 $0.62 \pm 0.23$ 3.9 35 30 35

11.13-13.75 1.7-1.0 $0.22 \pm 0.12$ 10.60 $1.40 \pm 0.45$ 8.7 94 80 102

13.75-16.38 1.0-0.7 $0.27 \pm 0.24$ 10.60 $1.58 \pm 0.76$ 1.3 115 109 142

16.38-19.00 0.7-0.4 $0.24 \pm 0.26$ 10.60 $2.78 \pm 1.41$ 2.4 136 125 191

ITERATION 3

8.50-11.13 3.7-1.7 $0.21 \pm 0.10$ 10.61 $0.62 \pm 0.23$ 3.9 35 30 35

11.13-13.75 1.7-1.0 $0.22 \pm 0.12$ 10.61 $1.39 \pm 0.47$ 8.7 94 80 102

13.75-16.38 1.0-0.7 $0.27 \pm 0.24$ 10.61 $1.58 \pm 0.75$ 1.3 115 109 142

16.38-19.00 0.7-0.4 $0.24 \pm 0.27$ 10.61 $2.86 \pm 1.47$ 2.4 137 127 195

**Table 4:** Results of King's empirical profile fitting to the radial surface density distribution. Columns 1 and 2 give the V magnitude ranges and the corresponding mass ranges; Col. 3 the fitted normalization constant, Col. 4 the assumed tidal radius, Col. 5 the fitted core radius, Col. 6 the $\chi ^2$ of the fitting. Finally, Col. 7 lists the number of counted cluster members in our investigated region for each magnitude subset, while Cols. 8 and 9 are the total number of cluster members predicted by the fitted model within the investigated radius ( $\sim$ 3.7 parsec) and the tidal radius, respectively. The values are given for each of the four step of the adopted iterative procedure.
$\Delta V$	M	$\rho_0$	$r_{\rm t}$	$r_{\rm c}$	$\chi ^2$	$N_{\rm sur}^{\rm cl}$	$N_{\rm sur}^{\rm cal}$	$N_{\rm tid}$
	$(M_\odot)$	$({\rm stars/arcmin}^2)$	(pc)	(pc)
			ITERATION 0
8.50-11.13	3.7-1.7	$0.21 \pm 0.10$	10.36	$0.59 \pm 0.22$	4.2	34	29	33
11.13-13.75	1.7-1.0	$0.22 \pm 0.13$	10.36	$1.34 \pm 0.46$	8.5	88	76	95
13.75-16.38	1.0-0.7	$0.27 \pm 0.24$	10.36	$1.49 \pm 0.73$	1.3	106	101	129
16.38-19.00	0.7-0.4	$0.22 \pm 0.26$	10.36	$2.66 \pm 1.48$	2.5	119	111	164
			ITERATION 1
8.50-11.13	3.7-1.7	$0.21 \pm 0.10$	10.57	$0.62 \pm 0.23$	4.0	35	30	34
11.13-13.75	1.7-1.0	$0.23 \pm 0.13$	10.57	$1.36 \pm 0.44$	8.7	93	81	103
13.75-16.38	1.0-0.7	$0.27 \pm 0.24$	10.57	$1.55 \pm 0.74$	1.3	113	108	140
16.38-19.00	0.7-0.4	$0.24 \pm 0.25$	10.57	$2.65 \pm 1.30$	2.5	134	124	185
			ITERATION 2
8.50-11.13	3.7-1.7	$0.21 \pm 0.10$	10.60	$0.62 \pm 0.23$	3.9	35	30	35
11.13-13.75	1.7-1.0	$0.22 \pm 0.12$	10.60	$1.40 \pm 0.45$	8.7	94	80	102
13.75-16.38	1.0-0.7	$0.27 \pm 0.24$	10.60	$1.58 \pm 0.76$	1.3	115	109	142
16.38-19.00	0.7-0.4	$0.24 \pm 0.26$	10.60	$2.78 \pm 1.41$	2.4	136	125	191
			ITERATION 3
8.50-11.13	3.7-1.7	$0.21 \pm 0.10$	10.61	$0.62 \pm 0.23$	3.9	35	30	35
11.13-13.75	1.7-1.0	$0.22 \pm 0.12$	10.61	$1.39 \pm 0.47$	8.7	94	80	102
13.75-16.38	1.0-0.7	$0.27 \pm 0.24$	10.61	$1.58 \pm 0.75$	1.3	115	109	142
16.38-19.00	0.7-0.4	$0.24 \pm 0.27$	10.61	$2.86 \pm 1.47$	2.4	137	127	195

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