\begin{table}
  \caption{Criteria used to determine whether a secondary is a companion star or a background star. Results are listed for secondaries found around the 22~targets observed with NACO ({\em top part of the table}) and the 9~targets with multi-color observations in the ADONIS dataset ({\em bottom part of the table}). Columns 1 and 2 show the secondary designation and the status of the component as determined in this paper (c = companion star; ? = candidate companion star; b = background star). Columns~$3{-}5$ show the compatibility of the location of the object in the color--magnitude diagrams with the isochrones in terms of $\chi^2$. Confirmed companions have $\chi^2 < 2.30$ and (confirmed) background stars have $\chi^2 > 11.8$. The other secondaries have $2.30 < \chi^2 < 11.8$ and are labeled "candidate companion''. A substantial fraction of these candidate companions may in fact be background stars. Several faint ($K_{\rm S} > 14$~mag) secondaries are only detected in one filter (thus have no $\chi^2$), and are all assumed to be background stars. \label{table: criteria}}
\begin{tabular}{ l| c | rrr  }  
  \hline \hline\noalign{\smallskip}
  Star & Status & $\chi^2_{J-K_{\rm S},M_{K_{\rm S}}}$ & $\chi^2_{H-K_{\rm S},M_{K_{\rm S}}}$ & $\chi^2_{J-H,M_{J}}$  \\
  \hline
HIP~59502    -1   &   c  &   $2.11$    &    $1.09$    &    $0.19$        \\
HIP~59502    -2   &   b  &   ---    &    $75.23$    &    ---        \\
HIP~59502    -3   &   b  &   ---    &    ---    &    ---        \\
HIP~60851    -1   &   b  &   $7.77$    &    $1.29$    &    $15.51$        \\
HIP~60851    -2   &   b  &   ${>}52.81$    &    $0.19$    &    ${>}45.54$        \\
HIP~60851    -3   &   ?  &   ---    &    $7.54$    &    ---        \\
HIP~60851    -4   &   b  &   ---    &    $22.34$    &    ---        \\
HIP~60851    -5   &   b  &   ---    &    $26.37$    &    ---        \\
HIP~60851    -6   &   b  &   ---    &    ---    &    ---        \\
HIP~60851    -7   &   b  &   ---    &    ---    &    ---        \\
HIP~60851    -8   &   b  &   ---    &    $237.30$    &    ---        \\
HIP~61265    -1   &   ?  &   $4.46$    &    $0.02$    &    $3.83$        \\
HIP~61265    -2   &   b  &   $13.77$    &    $1.81$    &    $5.29$        \\
HIP~61265    -3   &   b  &   ---    &    $13.70$    &    ---        \\
HIP~61265    -4   &   b  &   ---    &    $66.72$    &    ---        \\
HIP~61265    -5   &   b  &   ---    &    ---    &    ---        \\
HIP~62026    -1   &   c  &   $0.91$    &    $0.09$    &    $0.24$        \\
HIP~63204    -1   &   b  &   $71.62$    &    $9.64$    &    $17.02$        \\
HIP~63204    -2   &   c  &   $1.76$    &    $0.01$    &    $1.38$        \\
HIP~67260    -1   &   c  &   $0.01$    &    $0.00$    &    $0.01$        \\
HIP~67260    -2   &   ?  &   ---    &    $7.20$    &    ---        \\
HIP~67260    -3   &   ?  &   $1.45$    &    $3.59$    &    $5.27$        \\
HIP~67919    -1   &   c  &   $0.02$    &    $0.86$    &    $0.39$        \\
HIP~68532    -1   &   c  &   $0.93$    &    $1.10$    &    $0.00$        \\
HIP~68532    -2   &   c  &   $1.06$    &    $0.02$    &    $1.70$        \\
HIP~69113    -1   &   c  &   $1.26$    &    $0.09$    &    $0.63$        \\
HIP~69113    -2   &   c  &   $0.56$    &    $0.04$    &    $1.38$        \\
HIP~73937    -1   &   c  &   ---    &    $0.01$    &    ---        \\
HIP~73937    -2   &   b  &   ---    &    $22.37$    &    ---        \\
HIP~78968    -1   &   ?  &   $3.88$    &    $1.26$    &    $0.73$        \\
HIP~79098    -1   &   b  &   $8.45$    &    $14.45$    &    $39.65$        \\
HIP~79410    -1   &   b  &   $21.58$    &    $23.51$    &    $19.09$        \\
HIP~79739    -1   &   c  &   $0.44$    &    $0.09$    &    $0.91$        \\
HIP~79771    -1   &   c  &   $1.46$    &    $0.24$    &    $0.52$        \\
HIP~79771    -2   &   nc  &   $0.00$    &    $0.04$    &    $0.02$        \\
HIP~80142    -1   &   b  &   $164.54$    &    $59.81$    &    $33.27$        \\
HIP~80142    -2   &   ?  &   ---    &    ---    &    $2.61$        \\
HIP~80474    -1   &   b  &   $5.08$    &    $73.31$    &    $36.05$        \\
HIP~80799    -1   &   c  &   $1.11$    &    $0.12$    &    $0.62$        \\
HIP~80896    -1   &   c  &   $0.73$    &    $0.02$    &    $0.53$        \\
HIP~81949    -1   &   b  &   $66.30$    &    $7.46$    &    $27.51$        \\
HIP~81949    -2   &   b  &   $15.93$    &    $0.91$    &    $8.99$        \\
HIP~81949    -3   &   b  &   ${>}13.09$    &    $0.02$    &    ${>}19.08$        \\
HIP~81949    -4   &   ?  &   ${>}3.88$    &    $5.69$    &    ${>}5.59$        \\
HIP~81949    -5   &   b  &   ---    &    ---    &    ---        \\
HIP~81949    -6   &   ?  &   ${>}9.95$    &    $0.98$    &    ${>}6.88$        \\
HIP~81949    -7   &   b  &   ${>}5.16$    &    ${>}11.84$    &    ---        \\
HIP~81949    -8   &   b  &   ---    &    ---    &    ---        \\
HIP~81949    -9   &   b  &   ---    &    ---    &    ---        \\
HIP~81949    -10   &   b  &   ---    &    ---    &    ---        \\
HIP~81949    -11   &   b  &   ---    &    ---    &    ---        \\
HIP~81949    -12   &   b  &   ---    &    ---    &    ---        \\
HIP~81972    -1   &   ?  &   $4.36$    &    $2.27$    &    $0.57$        \\
HIP~81972    -2   &   ?  &   $1.42$    &    $1.08$    &    $6.03$        \\
HIP~81972    -3   &   c  &   $0.56$    &    $1.65$    &    $0.20$        \\
HIP~81972    -4   &   nc  &   $0.51$    &    $0.11$    &    $0.13$        \\
HIP~81972    -5   &   nc  &   $0.90$    &    $0.07$    &    $0.40$        \\
HIP~81972    -6   &   b  &   ---    &    ${>}16.02$    &    ---        \\
HIP~81972    -7   &   b  &   ---    &    ---    &    ---        \\
HIP~81972    -8   &   b  &   ---    &    ---    &    ---        \\
HIP~83542    -1   &   ?  &   ---    &    $8.25$    &    ---        \\
HIP~83542    -2   &   b  &   ---    &    ---    &    ---        \\
\hline
\multicolumn{5}{l}{ADONIS targets with multi-color observations}\\ 
\hline
HIP~53701    -1   &   b  &   $12.01$    &    $3.72$    &    $0.80$        \\
HIP~53701    -2   &   b  &   $33.11$    &    $8.54$    &    $8.16$        \\
HIP~76071    -1   &   c  &   ---    &    $0.57$    &    ---        \\
HIP~77911    -1   &   c  &   $0.73$    &    $0.00$    &    $0.74$        \\
HIP~78530    -1   &   ?  &   ---    &    $3.10$    &    ---        \\
HIP~78809    -1   &   c  &   $0.82$    &    $0.74$    &    $0.02$        \\
HIP~78956    -1   &   c  &   $0.01$    &    $0.25$    &    $0.33$        \\
HIP~79124    -1   &   c  &   $0.22$    &    $0.83$    &    $1.88$        \\
HIP~79156    -1   &   c  &   $0.41$    &    $1.94$    &    $0.45$        \\
HIP~80238    -1   &   c  &   $0.43$    &    $0.89$    &    $0.06$        \\
\end{tabular}
  \end{table}