\begin{table}%T1
\caption{Main parameters for calculating photon and neutrino
production.}
\small%\centering
\par
\begin{tabular}{cccccccccc}
\hline\hline
 \noalign{\smallskip}
$\xi$& $\chi$ & $\alpha$ & $B_{\rm neb}$ (G) & $I$ (g cm$^2$) &
$\tau_0$ (yr) &Age (yr) & $n_{\rm H}$ (cm$^{-3})$ & $r_0$ (pc) &$d$
(pc)
\\
\hline\noalign{\smallskip}
0.85 & 0.42 & 2.4 & $4\times10^{-4}$  & $10^{45}$ & 500 &1000 & 38 &
1.0 & 2000
\\
\hline 
\end{tabular} 
\end{table}