Table 5: Probability of unrelated companions to the triple/quadruple systems as estimated from 2MASS.
System Comp. $\Sigma$ ( $K<K_{\rm comp}$) $P_{\rm unrelated}$
    [arcsec-2]  
ESO H$\alpha $ 283.... C 1.36 $\times $ 10-3 2.9 $\times $ 10-2
  D 1.70 $\times $ 10-3 0.37
PH$\alpha $ 30............ C 2.19 $\times $ 10-4 8.8 $\times $ 10-2
VW Cha........... D 1.27 $\times $ 10-5 5.4 $\times $ 10-3
CGH$\alpha $ 5/6........ B 7.10 $\times $ 10-6 5.6 $\times $ 10-6
  C 7.10 $\times $ 10-6 2.8 $\times $ 10-3
Sz 41................. C 4.94 $\times $ 10-6 2.1 $\times $ 10-3
Sz 30................. C 1.45 $\times $ 10-5 9.2 $\times $ 10-4
UZ Tau............. B 3.09 $\times $ 10-7 1.3 $\times $ 10-5
J 4872............... C 5.25 $\times $ 10-6 1.8 $\times $ 10-4
UX Tau............. D 7.10 $\times $ 10-6 1.6 $\times $ 10-4
LkH$\alpha $ 336.......... C 1.67 $\times $ 10-5 1.8 $\times $ 10-3
FV Tau............. C 2.78 $\times $ 10-6 1.3 $\times $ 10-3
GG Tau............. C 8.02 $\times $ 10-6 2.6 $\times $ 10-3
LkH$\alpha $ 262/263... D 2.16 $\times $ 10-6 1.6 $\times $ 10-3
LkH$\alpha $ 346 .......... C 1.54 $\times $ 10-4 5.9 $\times $ 10-4
  D 3.70 $\times $ 10-5 3.0 $\times $ 10-3
ROXs 43 ............. B 1.88 $\times $ 10-5 5.3 $\times $ 10-6
  C 2.16 $\times $ 10-6 1.4 $\times $ 10-4
SR 24 ................. C 1.36 $\times $ 10-5 1.1 $\times $ 10-3
Sz 68 .................. B 4.94 $\times $ 10-6 2.4 $\times $ 10-7
  C 1.27 $\times $ 10-5 3.1 $\times $ 10-4

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