\begin{table}%t2
\caption{\label{tab:integrated}Measurements of \object{M31} infrared integrated fluxes.}
%\centerline
 {\small \begin{tabular}{l l l c c c c c c c} 
\hline\hline \noalign{\smallskip}
$\lambda ^a$ & $\lambda_{\min}^{a}$ & $\lambda_{\max}^{a}$ & This work & IRAC & MIPS & COBE & IRAS & MSX & ISO \\ 
$\mu$m & $\mu$m & $\mu$m & Jy & Jy & Jy & Jy & Jy & Jy & Jy \\
\hline 
1.27 & 1.1   & 1.5   & &  &  & 534 $\pm$ 107   &  &   &  \\ 
2.22 & 2.0   & 2.4   &   &    &    & 461 $\pm$ 92    &                &            &                \\ 
3.53 & 3.0   & 4.1   &                 &             &                 & 245 $\pm$ 49    &                &            &                \\ 
3.55 & 3.2   & 3.9   & 239 $\pm$ 29      & 259 $\pm$ 32$^b$&                 &                 &                &            &                \\ 
4.88 & 4.5   & 5.3   &                 &             &                 & 128 $\pm$ 26    &                &            &                \\ 
4.49 & 4.0   & 5.0   &                 & 144 $\pm$ 20 &                 &        &                &            &                \\
5.73 & 5.0   & 6.5   &                 & 190 $\pm$ 35  &                 &       &                &            &                \\
7.87 & 6.4   & 9.5   & 149 $\pm$ 27      & 151 $\pm$ 21 &                 &     &                &            &                \\
8.3 & 6.0   & 10.9  &                 &             &                 &         &                & 159 $\pm$ 32 &                \\
12.0 & 7.6   & 15.4  &                 &             &                 &                 & 163 $\pm$ 24    &            &                \\ 
         23.7 & 20.5  & 28.5  & 118 $\pm$ 17      &             & 107 $\pm$ 11    &                 &                &            &                \\
         25.0 & 16.5  & 30.4  &                 &             &                 &                 & 108 $\pm$ 16    &            &                \\ 
         56.0 & 38.6  & 76.5  &                 &             &                 & 700 $\pm$ 140   &                &            &                \\ 
         60.0 & 37.0  & 82.8  &                 &             &                 &                 & 536 $\pm$ 80   &            &                \\ 
         71.4 & 55.1  & 91.6  & 1086 $\pm$ 256  &             & 940 $\pm$ 188   &                 &                &            &                \\
         97.7 & 68.6  & 121.8 &                 &             &                 & 3706 $\pm$ 741  &                &            &                \\ 
        100.0 & 74.4  & 130.6 &                 &             &                 &                 & 2928 $\pm$ 439 &            &                \\ 
        155.9 & 128.9 & 184.0 & 7315 $\pm$ 1632 &             & 7900 $\pm$ 1580 &                 &                &            &                \\ 
        147.9 & 108.2 & 181.7 &                 &             &                 & 7545 $\pm$ 1509 &                &            &                \\ 
        175.0 & 140.0 & 220.0 &                 &             &                 &                 &                &            & 7900 $\pm$ 800 \\
        247.9 & 174.7 & 335.9 &                 &             &                 & 6242 $\pm$ 1248 &                &            &                \\ 
        \hline 
      \end{tabular}}
\medskip
$^a$~The wavelengths reported in the first column are the nominal
wavelengths of each instrument waveband. The minimum and maximum
wavelengths reported in the second and third columns correspond to a
system response (filter+detector) equal to 10\% of the maximum. In
particular, the system response functions were taken for Spitzer/IRAC
rom \url{http://ssc.spitzer.caltech.edu/irac/spectral\_response.html},
for Spitzer/MIPS from
\url{http://ssc.spitzer.caltech.edu/mips/MIPSfiltsumm.txt}, for COBE/DIRBE
 from \url{http://lambda.gsfc.nasa.gov/data/cobe/dirbe/ancil/spec\_resp/DIRBE
 \_SYSTEM\_SPECTRAL\_RESPONSE\_TABLE.ASC}, for IRAS from
 \url{http://irsa.ipac.caltech.edu/IRASdocs/exp.sup/ch2/tabC5.html}, for
 MSX/SpiritIII from \url{http://irsa.ipac.caltech.edu/data/MSX/docs/MSX\_psc\_es.pdf}
 (Appendix~A, Table~A-3), for ISO/ISOPHOT from
\url{http://www.mpia.de/ISO/welcome.html}; $^b$~uncertainties in this table have been taken directly from the literature when available. For COBE measurements, we assumed an error equal to 20\% of the measured flux in each band  as suggested by Odenwald et~al. (\cite{odenwald98}) and for IRAS measurements  equal to 15\% as suggested by Rice et~al. (\cite{rice88}). For our own measurements, the uncertainties have been derived as detailed in the text. 
 \end{table}