\begin{table}%t4
\caption{\label{visir-summary}Summary of the results of the analysis of the VISIR images.} 
%\centering
\small
\begin{tabular}{llll}
\hline \hline
Technique & PAH1 & PAH2 & SiC \\
\hline
{\bf $\ell$~Car} \\
Image & resolved & resolved & unresolved\\
 PSF sub. & no residual & no residual & unresolved \\
 Fourier & $\rho = 0.75 \pm 0.15\arcsec$ & $\rho = 1.17 \pm 0.18\arcsec$ & unresolved \\
 & $\alpha = 4.0 \pm 1.0$\% & $\alpha = 10.6 \pm 1.2$\% & \\
\hline  
{\bf RS~Pup}\\
Image & resolved & resolved & too faint \\
 PSF sub. & faint residual & residual $\approx$$10\%$ & too faint \\
 Fourier & $\rho = 0.8^{+0.8}_{-0.5}$ arcsec & $\rho = 1.04 \pm 0.21\arcsec$ & too faint \\
 & $\alpha = 2.3 \pm 1.2$\%& $\alpha = 23.5 \pm 2.0$\% & \\
\hline
\end{tabular}
\end{table}