\begin{table}%T2
\caption{\label{tb:4flav}Binding energies and desorbing fractions for the four-flavour CO~evaporation model$^{{a}}$.}
\small
%\centerline
{
\begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
Flavour & $E_\el{b}(\el{CO})/k$ (K)$^{{b}}$ & Fraction$^{{c}}$ \\
\hline
1       & \phantom{0}855                  & 0.350 \\
2       & \phantom{0}960                  & 0.455 \\
3       & 3260                            & 0.130 \\
4       & 5773                            & 0.065 \\
\hline
\end{tabular}}
\smallskip
$^{{a}}$ Based on \citet{viti04a}.\\
 $^{{b}}$ The rates for Flavours 1--3 are computed from \eq{desrate} with $X=\el{CO}$. The rate for Flavour~4 is equal to the \w{} desorption rate.\\
 $^{{c}}$ These numbers indicate fractions of adsorbing CO: 35\% of all adsorbing CO~becomes Flavour~1, and so on.
\end{table}