\begin{table}%t2
 \caption{\label{best_fit_no_ISRF}best-fit parameters for the case $G_0 = 1$. Note that 
 $\chi_{\rm red}^{2} = \chi ^{2}/\nu$ where $\nu$ is the number of degrees of
  freedom. }
%\centerline
{\begin{tabular}{lccccc} \hline \hline 
\noalign{\smallskip}
Observation  & $\alpha$ & $Y$ & $\tau_{100}$ & $\chi _{\rm red}^{2}$ & $\nu$\\ \hline
850~$\mu$m profile  & 1.4 & 160 & $-$    & 0.72 & 10 \\
450~$\mu$m profile  & 0.6 & 120 & $-$    & 0.63 & 10 \\
350~$\mu$m profile  & 0.5 & 170 & $-$    & 0.47 & 10 \\ 
All profiles        & 0.6 & 120 & $-$    & 1.24 & 36 \\ 
SED                 & $-$   & $-$   & 0.6  & 0.55 &  3 \\ \hline
\end{tabular}}
\smallskip
The first line reports the best-fit obtained using only the
  850~$\mu$m brightness profile; second line, using the 450~$\mu$m
  brightness profile; third line, using the 350~$\mu$m brightness
  profile; fourth line gives the best-fit using the three profiles;
  the last line gives the best-fit using the
  SED.
\end{table}