\begin{table}%t3
\caption{\label{tab_beta_ratio_med}Median values of the emissivity spectral index ($\beta$) for the
FIR and submm domain, for each studied cases.}
%\centerline
 {\begin{tabular}{  c  c  c  c  c  }
\hline
\hline
$\rm \lambda$ Range  & Phase & Case 1: \CaseOne & Case 2: \CaseTwo&  Case 3: \CaseThree \\
\hline
$\rm \beta$ [100--240] $\rm \mic$ & HI & 2.4 $\pm$ 0.5 & 2.1 $\pm$ 0.6 & 2.8 $\pm$ 0.9 \\
  & CO & 2.5 $\pm$ 0.6 & 2.8 $\pm$ 0.6 & 2.1 $\pm$ 0.5 \\
$\rm \beta_{CO}/\beta_{HI}$ && 1.0  $\pm$ 0.5 & 1.3 $\pm$ 0.5 & 0.7 $\pm$ 0.6 \\
$\beta$ [550--2100] $\mic$ & HI &  1.5 $\pm$ 0.2 & 1.5 $\pm$ 0.2 & 1.5 $\pm$ 0.1\\
  & CO & 1.4 $\pm$ 0.2 & 1.5 $\pm$ 0.2 & 1.7 $\pm$ 0.2\\
$\beta_{\rm CO}/\beta_{\rm HI}$& & 0.9  $\pm$ 0.3 & 1.0 $\pm$ 0.2 & 1.1 $\pm$ 0.2 \\
\hline
\end{tabular}}
\smallskip
Errors bars represent
the 1-$\rm \sigma$ uncertainty estimates.
\end{table}