\begin{table}%tB.1
\caption{\label{phot}Aperture photometry of NGC 6720 in various photometric bands.}
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\begin{tabular}{lllllll}
\hline \hline \noalign{\smallskip}
$\lambda$ & Aperture & Flux & Pixel size & Beam size & Source \\
$\mu$m & \arcsec & Jy & \arcsec & \arcsec \\
\hline
12 & & $0.82\pm0.07$ & & & IRAS \\
25 & & $10.1\pm0.5$ & & & IRAS \\
60 & & $52.\pm6.$ & & & IRAS \\
65 & & $55.\pm5.$ & & & AKARI \\
70  & 150 & $59.\pm7.\pm6.$ & 1 & ${\sim}5.2$ & PACS  \\
90 & & $70.\pm7.$ & & & AKARI \\
100 & & $55.\pm5.$ & & & IRAS \\
140 & & $37.\pm4.$ & & & AKARI \\
160 & 150 & $30.\pm3.\pm6.$ & 2 & ${\sim}12$ & PACS  \\
160 & 152  & $28.\pm7.$  & 8 & ${\sim}40$& {\it Spitzer}\\
160 & & $37.\pm14.$ & & & AKARI \\
250 & 168 & $13.\pm6.\pm4.$ & 6    & 18.1& SPIRE \\
350 & 150 & $8.\pm4.\pm2.$ & 10 & 25.2& SPIRE \\
500 & 154 &  $2.2\pm1.5\pm0.7$ & 14 & 36.6& SPIRE \\
\hline
\end{tabular}
\tablefoot {The apertures are elliptical and the semimajor axis is listed in the second column. The
fluxes are listed with their measurement and calibration uncertainties, respectively. For the {\it Spitzer} data no measurement uncertainties were obtained. The AKARI data were taken from Izumiura et~al. (in~prep.). The pixel and beam sizes in the {\it Herschel} and {\it Spitzer} maps are also given.}
\end{table}