\begin{table}%t2
\caption{\label{intensites}Relative NIR clathrate hydrate and methane ice integrated intensities\tablefootmark{a}.}
%\centerline
{
\small\begin{tabular}{l c c}
\hline\hline\noalign{\smallskip}
Dominant transitions	         &Clathrate (5.6~K)		&Methane ice\tablefootmark{b}
\\
\hline
$3\nu_4$				&0.063	&$\sim$0.054\tablefootmark{c}		\\
$\nu_2+2\nu_4$		&0.010	&0.013			\\
$\nu_1+\nu_4$			&0.511	&0.524			\\
$\nu_3+\nu_4$			&{\it 1.0}\tablefootmark{a}		&{\it1.0}\tablefootmark{a}		\\
$\nu_2+\nu_3$			&0.099	&0.095			\\
$\nu_3+2\nu_4$		&0.014	&0.014			\\
$2\nu_2+2\nu_4$		&0.004	&$\sim$0.004\tablefootmark{d}	\\
$\nu_2+\nu_3+\nu_4$	&0.028	&0.029			\\
$2\nu_3$				&0.042	&0.061			\\
\hline
\end{tabular}}
\tablefoot{
\tablefoottext{a}{Normalised to the $\nu_3+\nu_4$ transitions;}
\tablefoottext{b}{Brunetto et~al. (\cite{Brunetto2008}) at 16~K;}
\tablefoottext{c}{intensity before normalisation estimated from the ratio of absorption coefficient of $(\nu_1+\nu_4)$/$3\nu_4$ from Quirico \& Schmitt (\cite{Quirico1997}) at 21~K, assuming the same line width for both transitions;}
\tablefoottext{d}{ integrated intensity before normalisation estimated from the spectrum of the blended $(2\nu_2+2\nu_4)$/$(\nu_3+2\nu_4)$ lines from Fig.~\ref{Fig_deformed}b in Quirico \& Schmitt (\cite{Quirico1997}) at 21~K.}}
\end{table}