Table 4: Field-star decontamination: integrated statistics.
Object ${ R_{\max}}$ $ N_{\rm obs}$ $ N_{\rm cl}$ $ N_{1\sigma}$ $ \sigma_{\rm FS}$ $ FS_{\rm unif}$
  ($^\prime$) (stars) (stars)   (stars)  
  Confirmed OCs
Be 23 4 $222\pm14.9$ 67 4.5 10.9 0.06
Be 69 4 $308\pm17.5$ 134 7.6 9.6 0.05
Be 71 3 $216\pm14.7$ 104 7.1 6.0 0.05
Cz 23 4 $228\pm14.1$ 66 4.4 15.6 0.07
NGC 1798 4 $372\pm19.3$ 156 8.1 13.3 0.06
NGC 1883 4 $291\pm17.1$ 115 6.7 7.5 0.04
NGC 2126 5 $227\pm15.1$ 76 5.0 6.8 0.04
FSR 756 4 $141\pm11.9$ 44 3.7 5.2 0.05
FSR 814 3 $187\pm13.7$ 89 6.5 5.4 0.04
FSR 869 4 $378\pm19.4$ 96 4.9 23.1 0.08
FSR 923 4 $256\pm16.0$ 69 4.3 14.1 0.06
FSR 932 5 $361\pm19.0$ 81 4.2 7.1 0.02
FSR 942 3 $184\pm13.6$ 94 6.8 3.2 0.03
FSR 948 4 $280\pm16.7$ 66 3.9 9.3 0.04
FSR 974 3 $180\pm13.4$ 67 5.0 6.5 0.05
  Uncertain cases
FSR 773 2 $33\pm5.7$ 16 2.8 2.0 0.09
FSR 851 4 $158\pm12.6$ 49 3.9 7.5 0.06
FSR 855 3 $198\pm14.1$ 56 3.6 11.1 0.07
FSR 882 3 $93\pm9.6$ 31 3.2 2.6 0.04
FSR 884 2 $47\pm6.8$ 18 2.7 1.9 0.06
FSR 911 4 $310\pm17.6$ 59 3.3 17.8 0.07
  Possible field fluctuations
FSR 744 3 $144\pm12.0$ 37 3.1 3.3 0.03
FSR 776 3 $105\pm10.2$ 39 3.8 2.7 0.04
FSR 801 3 $65\pm8.1$ 25 2.9 2.8 0.06
FSR 841 3 $72\pm8.5$ 25 2.9 3.5 0.07
FSR 894 3 $169\pm13.0$ 42 3.2 8.0 0.06
FSR 927 2 $84\pm9.2$ 32 3.5 4.8 0.08
FSR 956 2 $65\pm8.1$ 13 1.6 2.0 0.04
Table Notes. Same as Table 5 for the statistics of the full magnitude range
covered by the respective CMD. CMDs extracted from $0\la R(\hbox{$^\prime$ })\la {R}_{\rm max}$.


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