\begin{table}%t4
%\footnotesize
\caption {\label{tab:models}Comparison of maximum likelihood model fitting results (see text for a
description of the models).}
%\centerline
 {\begin{tabular}{lrcr}
\hline\hline
\noalign{\smallskip}
Model & \multicolumn{1}{c}{TS} & Significance & \multicolumn{1}{c}{$p$} \\
\hline
\psmod\ & 1089.3 & 31.5 & 20 \\
\gmod\ & 1122.6 & 32.7 & 10 \\
$N(\hi)$ (optically thin) & 771.8 & 27.6 & 2 \\
$N(\hi)$ (D+L components) & 792.9 & 27.8 & 4 \\
$N(\hi)$ ($T_s=125$~K) & 794.9 & 28.1 & 2 \\
$N(\hi)$ ($T_s=60$~K) & 834.6 & 28.8 & 2 \\
$N(\hi)$ ($T_s=40$~K) & 835.3 & 28.8 & 2 \\
$N(\hmol)$ & 824.3 & 28.6 & 2 \\
$N(\hii)$ & 1110.1 & 33.2 & 2 \\
$N({\rm H})$ & 806.9 & 28.3 & 2 \\  
$N(\hi)+N(\hmol)+N(\hii)$ & 1110.7 & 32.9 & 6 \\
\hline
\end{tabular}}
\tablefoot {Columns are
(1) the name of the model,
(2) the TS of the fit,
(3) the detection significance, and
(4) the number of free parameters.}
\end{table}