\begin{table}%t8
    \caption{Best-fit spectral parameters for the X-ray sources for
      which variable abundance fits were performed.}
%%%\centering
\par
    \begin{tabular}{r|cccccc}
\hline  \hline
      Source & S3 (V826 Tau) & S6 (V827 Tau) & S7 (V1075 Tau) & S14 (V710 Tau)
      &  S19 (HL Tau) & S22 (HD~285845)\\
      \hline
      \nh & 0.096 $\pm$ 0.010 & $0.08\pm 0.04$ & $0.14\pm 0.03$ &
      $0.23\pm 0.03$ & $1.93\pm 0.14$ & $0.032\pm 0.007$\\
      $kT_1$ & $0.36\pm 0.02$ & $0.30\pm 0.03$ & $0.38\pm 0.02$ & $0.66\pm
      0.04$ & $3.16\pm 0.30$ & $0.67\pm 0.01$\\
      $kT_2$ & $1.36 \pm 0.06$ & $1.19\pm 0.10$ & $1.30\pm 0.13$ &
      $1.56\pm 0.18$ & -- & $2.06\pm 0.76$\\
      $\chi^2$ & 1.08 & 0.97 & 0.86 & 1.01 &1.15 & 1.04\\
      $P$ & 0.16 & 0.56 & 0.86 & 0.45 &0.16 & 0.31\\
      N & =Fe & =Fe & =Fe & =Fe & =Fe & =Fe\\
        O & =Fe & =Fe & =Fe & =Fe & =Fe & $0.42\pm 0.08$ \\
      Ne & $0.61 \pm 0.12$ & =Fe & $0.44\pm 0.16$ & $0.98\pm 0.45$ &
      =Fe & $1.11\pm 0.15$\\
      Mg & =Fe & =Fe & =Fe & =Fe & =Fe & =Fe \\
      Si & =Fe & =Fe & =Fe & =Fe & =Fe &  $0.13\pm 0.06$\\
      S & =Fe & $1.71\pm 0.67$ & =Fe & =Fe & $1.45\pm 0.61$ & =Fe\\
      Ca & $2.13 \pm 0.71$ & =Fe & =Fe & =Fe & =Fe & $2.37\pm 0.63 $\\
      Fe & $0.15\pm 0.02$ & $0.18\pm 0.09$ & $0.11\pm 0.04$ & $0.27\pm
      0.11$ & $0.49\pm 0.13$ & $0.26\pm 0.04$\\
      Ni & $0.61\pm 0.31$  & $1.38\pm 1.01$ & =Fe & =Fe & =Fe & =Fe\\
\hline
    \end{tabular}
    \label{tab:varabun}
\end{table}