\begin{table}%t7
\caption{\label{tab:systematics_xsec1}Best-fit transport parameters for various cross-section sets.}
%\centering
\par
\begin{tabular}{lcccccc} \hline\hline\noalign{\smallskip}
X-files  & $K_0^{\rm best}\times 10^2$     & $\delta^{\rm best}$ &  $V_{\rm c}^{\rm best}$  &  $V_{\rm a}^{\rm best}$  & $\chi^2$/d.o.f.  \\
               & (kpc$^2~$Myr$^{-1}$) &                     &  (km$\;$s$^{-1}$)  & (km$\;$s$^{-1}$)   & \\\hline
& \multicolumn{5}{c}{} \vspace{-0.25cm}\\
0:~WKS98    &   2.66   &   0.53   &   \dots   &   \dots   &    23.5    \vspace{0.05cm}\\  %chi2= 682.001 (31)
0:~S01                    &   3.40   &   0.40   &   \dots   &   \dots   &    34.5    \vspace{0.05cm}\\  %chi2= 1000.85 (31)
{\it 0:~W03}          &{\it 4.08}&{\it 0.40}&{\it \dots}&{\it \dots}& {\it 28.8} \vspace{0.05cm}\\  %chi2= 834.898 (31)
0:~GAL09    &   3.83   &   0.46   &   \dots   &   \dots   &    28.4    \vspace{0.25cm}\\  %chi2= 824.358 (31)
%
I:~WKS98    &   0.45   &   0.95   &   10.4    &   \dots   &    12.0    \vspace{0.05cm}\\  %chi2= 341.735 (31)
I:~S01                    &   0.25   &   1.01   &   11.9    &   \dots   &    13.5    \vspace{0.05cm}\\  %chi2= 378.265 (31)
{\it I:~W03}          &{\it 0.42}&{\it 0.93}&{\it 13.5} &{\it \dots}& {\it  11.2} \vspace{0.05cm}\\  %chi2= 313.469 (31)
I:~GAL09    &   0.49   &   0.95   &   13.6    &   \dots   &    12.3    \vspace{0.25cm}\\  %chi2= 345.666 (31)
%
II:~WKS98   &   7.19   &   0.31   &   \dots   &   71.5    &    3.40    \vspace{0.05cm}\\  %chi2=95.077   (31)
II:~S01                   &   9.27   &   0.22   &   \dots   &   68.8    &    6.56    \vspace{0.05cm}\\  %chi2=183.715  (31)
{\it II:~W03}         &{\it 9.76}&{\it 0.23}&{\it \dots}&{\it 73.1} & {\it  4.73} \vspace{0.05cm}\\  %chi2=132.499  (31)
II:~GAL09   &   10.0   &   0.26   &   \dots   &   85.0    &    4.03    \vspace{0.25cm}\\  %chi2=112.884  (31)
%
III:~WKS98  &   0.69   &   0.80   &   15.8    &   43.5    &    1.11    \vspace{0.05cm}\\  %chi2=29.963   (31)
III:~S01                  &   0.25   &   0.98   &   16.2    &   27.9    &    3.01    \vspace{0.05cm}\\  %chi2=81.3721  (31)
{\it III:~W03}        &{\it 0.48}&{\it 0.86}&{\it 18.8} &{\it 38.0} &{ \em 1.47} \vspace{0.05cm}\\  %chi2=39.7025  (31)
III:~GAL09  &   0.65   &   0.82   &   21.7    &   49.4    &    1.53    \vspace{0.10cm}\\  %chi2=41.3746  (31)
% N.B.: 161 steps between 0.05 and 5000 GeV/n used
\hline
\end{tabular}
\tablefoot{Models 0, I, II, and III for $L=4$~kpc. 
The four base sets of cross-sections are WKS98 from \citet{1998ApJ...508..940W},
S01 from a private communication of Aim\'e Soutoul (2001), W03 from \citet{2003ApJS..144..153W},
and GAL09 from the GALPROP code v50.1p (2009).}
\end{table}