\begin{table}%T2 \caption{\label{tab:data2}Color-corrected fluxes of EX~Lupi$^*$.} \small%\centerline { \begin{tabular}{l c c c c c c} \hline\hline $\lambda$[$\mu$m] & 1983 & 1997 Feb. 5 & 1997 Mar. 18 & 1997 Aug. 24 & 1997 Sept. 19 & 2005 Mar. 29 \\ & IRAS & ISOPHOT &ISOPHOT &ISOPHOT &ISOPHOT &Spitzer/IRAC \\ \hline 3.6 & &$0.17\pm0.03$ &$0.18\pm0.03$ & $0.15\pm0.02$ & $0.16\pm0.03$ &$0.190 \pm 0.004$\\ 4.5 & & & & & & $0.206\pm 0.004$ \\ 5.8 & & & & & & $0.236\pm 0.005$ \\ 8.0 & & & & & & $0.317\pm 0.007$\\ 12 & $0.76\pm 0.1$ &$0.73\pm0.11$ &$0.78\pm0.12$ & $0.76\pm0.12$ & $0.68\pm0.11$ &\\ 15 & &$0.54\pm0.08$ &$0.43\pm0.07$ & $0.47\pm0.07$ & $0.48\pm0.07$ &\\ 20 & &$1.06\pm0.15$ &$1.30\pm0.18$ & $0.91\pm0.13$ & $1.12\pm0.16$ &\\ 25 & $1.04\pm 0.1$ &$0.78\pm0.12$ &$0.87\pm0.14$ & $0.66\pm0.11$ & $1.29\pm0.21$ &\\ 60 & $1.35\pm 0.4$ &$1.52\pm0.32$ & & & &\\ 100 & $0.97\pm 0.5$ & &$1.27\pm0.17 $ & & &\\ 200 & & & & $1.23\pm 0.35$ & &\\ \hline \end{tabular}} \smallskip $^*$ For the ISOPHOT data we adopted a conservative formal uncertainty of 15\%. \end{table}