\begin{table}%t1
 \caption{Fluxes and other parameters of the quasar sample.
   The total submm fluxes are from Willott et~al. (\cite{Willott2002}), observed
   between March~1999 and April~2001.
   Column~7 lists the thermal contribution at 1.25~mm derived from a
   dust model fitted to the submm data, as explained in
   Sect.~\ref{section_1250_nature} and shown in Fig.~\ref{msxxxx_fig_seds_zoomed}.
   Column 8 lists the synchrotron contribution at~1.25~mm, as total
   minus thermal contribution (Cols.~3$-$7) and Col.~9 lists 
   the synchrotron fraction in percent. 
   The spectral indices $\alpha$$_{\rm cm-mm}$ are determined for most
   sources between~6~cm and 1.25~mm with an accuracy of better than~5\%;
   more details are given in Sect.~\ref{section_850_nature}.
   These spectral indices are used to extrapolate from longer wavelength data  
   the~450 and~850~$\mu$m synchrotron fluxes listed in Cols.~11 and~12.
   \label{msxxxx_table1}
 }
 %\centerline
{ \begin{tabular}{@{\hspace{0.5mm}}lr|rr|@{\hspace{0.5mm}}rr|@{\hspace{0.5mm}}rrr|@{\hspace{0.5mm}}c@{\hspace{0.5mm}}|@{\hspace{0.5mm}}rr@{\hspace{0.5mm}}}
 \hline \hline  
~~~(1)&(2)~~~&(3)~~~&(4)~~~&(5)~~~&(6)~~~&(7)~~~&(8)~~~&(9)&(10)~~~&(11)~~~&(12)~~~\\
\hline                                                                                                 Object &   $z$      & $F_{\rm 1.25~mm}$  & observ.& $F^{\rm total}_{\rm 850~\mu m}$ & $F^{\rm total}_{\rm 450~\mu m}$  & $F^{\rm thermal}_{\rm 1.25~mm}$& $F^{\rm syn}_{\rm 1.25~mm}$ & syn & $\alpha$$_{\rm cm-mm}$ & $F^{\rm syn}_{\rm 850~\mu m}$ & $F^{\rm syn}_{\rm 450~\mu m}$   \\
         &          &  [mJy]          & date     &    [mJy]          & [mJy]               &   [mJy]  &    [mJy]  & [\%] &                   & [mJy]                    & [mJy]                     \\
\hline                                                                                                 3C~ 181 & 1.382    & 5.96 $\pm$ 1.11 & 17.10.04 &   5.27 $\pm$ 1.06 &  $-$0.8 $\pm$  7.5 &       0.66   &       5.30  & 88 &   $-$1.23            &   3.73                   &                           \\
  3C~ 191 & 1.952    & 5.36 $\pm$ 1.24 & 17.10.04 &   6.39 $\pm$ 1.06 &    28.9 $\pm$  8.1 &       1.04   &       4.32  & 80 &   $-$1.17            &   3.44                   &   1.63                    \\
  3C~ 205 & 1.534    &                 &          &   2.36 $\pm$ 1.10 &    11.6 $\pm$  7.9 &              &             &    &   $-$1.35\parbox{0cm}{$^{b}$}& 2.24\parbox{0cm}{$^{b}$}&            \\
3C~ 268.4 & 1.400    & 8.53 $\pm$ 1.56 & 16.10.04 &   5.13 $\pm$ 1.18 &     9.9 $\pm$  12.5 &       1.11   &       7.42  & 86 &   $-$1.10            &   5.55                   &                           \\
3C~ 270.1 & 1.519    &11.92 $\pm$ 2.69 & 02.06.04 &   7.42 $\pm$ 1.17 &    15.4 $\pm$  11.5 &       1.07   &      10.85  & 91 &   $-$1.11            &   7.76                   &   3.83                    \\
3C~ 280.1 & 1.659    & 3.99 $\pm$ 1.24 & 16.10.04 &   5.10 $\pm$ 1.74 &     0.4 $\pm$  23.8 & $<$1.31\parbox{0cm}{$^{a}$}&$>$2.68\parbox{0cm}{$^{a}$}& 67 &  $-$1.15            &   2.62                   &                           \\
3C~ 298   & 1.439    &20.68 $\pm$ 3.68 & 02.06.04 &  21.13 $\pm$ 2.06 &  $-$8.0 $\pm$  23.7 &       2.12   &      18.56  & 89 &   $-$1.10            &  13.88                   &                           \\
3C~ 318   & 1.574    & 5.61 $\pm$ 1.42 & 02.06.04 &   7.78 $\pm$ 1.00 &    21.6 $\pm$  10.6 &       0.99   &       4.62  & 82 &   $-$1.32            &   3.53                   &                           \\
3C~ 432   & 1.785    & 0.34 $\pm$ 1.54 & 29.05.04 &   7.93 $\pm$ 1.70 &     2.9 $\pm$  20.9 &       2.06   &   $<$2.56  & 55 &   $-$1.25\parbox{0cm}{$^{b}$}& 1.60\parbox{0cm}{$^{b}$}&            \\
4C~ 38.30 & 1.405    &                 &          &$-$0.01 $\pm$ 1.11 &     8.9 $\pm$  7.8 &              &             &    &   $-$1.10\parbox{0cm}{$^{b}$}& 1.14\parbox{0cm}{$^{b}$}&            \\
4C~ 35.23 & 1.594    &11.93 $\pm$ 2.89 & 02.06.04 &   9.18 $\pm$ 1.10 &    21.3 $\pm$  6.8 &       0.68   &      11.25  & 94 &   $-$0.89            &   8.60                   &   4.88                    \\     
     \hline
   \end{tabular}}
   \smallskip
$^{a}$ Upper and lower limits adopted, because the thermal model is constrained by submm upper flux limits only.\\
$^{b}$ Determined/extrapolated from the cm wavelength range only.
\end{table}