\begin{table}%ta.5 \caption{\label{table:photo-hbc639}Photometric flux measurement of HBC~639. The flux can be ascribed to the main component up to wavelengths in $L$~band.} %\centerline {\small \begin{tabular}{llr} \hline\hline Wavelength [${\rm \mu m}$] & Flux [Jy] & Ref. \\ \hline $0.36 $& $0.0001 $ & { 1} \\ $0.44 $& $0.0008 $ & { 1} \\ $0.55 $& $0.0053 $ & { 1} \\ $0.64 $& $0.018 $ & { 2} \\ $0.79 $& $0.065 $ & { 2} \\ $1.25 $& $0.33 \pm 0.10 $ & { 3}\\ $1.65 $& $0.77 \pm 0.16 $ & { 3} \\ $2.20 $& $0.92 \pm 0.09 $ & { 3} \\ $3.50 $& $0.75 \pm 0.07 $ & { 4} \\ $4.80 $& $0.98 $ & { 5} \\ $7.70 $& $0.60 $ & { 5} \\ $10.0 $& $1.06 $ & { 5} \\ $12.0 $& $1.87 $ & { 5} \\ $12.8 $& $2.57 $ & { 5} \\ $15.0 $& $2.41 $ & { 5} \\ $20.0 $& $2.30 $ & { 5} \\ $25 $& $5.91 $ & { 6} \\ $60 $& $35 $ & { 6} \\ $100 $& $40 $ & { 6} \\ $800 $& $0.037 \pm 0.008 $ & { 7} \\ $1300 $& $0.065 \pm 0.019 $ & { 8} \\ \hline \end{tabular}} \medskip References~-- {1}: Bouvier \& Appenzeller~(\cite{bouvier}); {2}:~Rydgren (\cite{rydgren}); {3}:~Prato et~al. (\cite{prato}); {4}:~Mc~Cabe et~al. (\cite{cabe}); {5}:~Gras-Velazquez \& Ray (\cite{gras-velazquez}); {6}:~Gezari Catalogue~(\cite{gezari}); {7}:~Jensen et~al. (\cite{jensenII}); {8}:~N\"urnberger et~al. (\cite{nuernberger}). \end{table}