\begin{table}%t4
\caption{\label{tab:best_fit_B/C+O}Best-fit values from a simultaneous fit on B/C and O.}
%\centering
\par
\begin{tabular}{lcccc} \hline\hline\noalign{\smallskip}
Model & $\eta_{\rm S}^{\rm (B/C+O)}$  & $\alpha^{\rm (B/C+O)}$ & $\delta^{\rm (B/C+O)}$ & $\chi^2_{\rm min}/$d.o.f.  \\\hline
0     &      $-0.82$        &        2.22        &        0.41        & 25.3  \\
I     &      $-1.23$        &        2.23        &        0.98        & 9.23  \\
II    &      $1.24$         &        2.24        &        0.35        & 3.62  \\ 
III   &      $1.56$         &        2.30        &        0.95        & 2.31   \\
\hline
\end{tabular}
\tablefoot{The data used are IMP7-8, Voyager~1\&2, ACE, HEA0-3, Spacelab, and CREAM04 for the B/C ratio, and HEAO-3 for the oxygen flux.}
\end{table}