\begin{table}%t2
\caption{\label{israt}Isotopic ratios of sulfur$^{a}$.}
%\centerline
{
\begin{tabular}{c c c c c }
\hline\hline
Ratio&solar & ISM &C.R. &IRC+10216 \\
& system & & & \\
 \hline
$^{32}$S/$^{34}$S&22.64(0.00)&24.4(5)$^b$&16($-$5, +11)&21.8(2.6)\\
$^{32}$S/$^{33}$S&126.95(0.05)&$\sim$150&38($-$18, +500)&121(15)\\
$^{32}$S/$^{36}$S&6519(20)&3280(760)& &2700(600)\\
$^{34}$S/$^{33}$S&5.606(0.002)&6.3(1)&&5.6(.3)\\
$^{34}$S/$^{36}$S&288(1)&115(17)&&107(15)\\
\hline
\end{tabular}}
\smallskip
$^a$ References: solar system data: Canyon Diablo troilite (CDT),
Ding et~al. (\cite{ding2001}); ISM data: Chin et~al.
(\cite{chin96}), Mauersberger et~al. (\cite{mauersberger96}), most
ISM data are from the inner Galaxy; Cosmic Rays: these are
"source abundances'', Thayer (\cite{thayer97}); IRC+10216: Kahane
et~al. (\cite{Kahane00}), this paper. \\
$^b$ The average value for
sources at various galactocentric radii; the data by Chin et~al.
(\cite{chin96}) indicate a possible galactocentric
$^{32}$S/$^{34}$S~abundance gradient, which would correspond to a
value of 32($\pm5$) at the solar circle.
\end{table}