\begin{table}%[h!]%t5
\par
\caption{\label{tab:abundances}Coronal and photospheric abundances of the elements ([X/H], solar
  units) in the target stars.} 
%\centerline
 {\tiny \begin{tabular}{lrccrrrrrrrr}
\hline \hline
{X} & {FIP} & Ref.$^a$ & (AG89$^a$) & \multicolumn{2}{c}{AR Psc} &
\multicolumn{2}{c}{AY Cet} & \multicolumn{2}{c}{$\lambda$ And$^b$} &
\multicolumn{2}{c}{V851 Cen$^b$}\\ 
    &  eV   & \multicolumn{2}{c}{solar photosphere} & Photosphere & Corona & Photosphere & Corona & Photosphere & Corona & Photosphere & Corona\\
\hline
%----------------
 Na &  5.14 &  6.17 & (6.33) &  0.33 $\pm$ 0.12 & \ldots &  0.49 $\pm$ 0.09 & \ldots & --0.09 $\pm$ 0.10 & \ldots &  0.39 $\pm$ 0.11 & \ldots \\
 Al &  5.98 &  6.37 & (6.47) &  0.33 $\pm$ 0.12 & \ldots &  0.34 $\pm$ 0.09 & \ldots & \ldots &  0.05 $\pm$ 0.17 &  0.35 $\pm$ 0.05 & \ldots \\
 Ca &  6.11 &  6.31 & (6.36) &  0.21 $\pm$ 0.15 & \ldots &  0.26 $\pm$ 0.15 & \ldots & --0.15 $\pm$ 0.10 & --0.20 $\pm$ 0.37 &  0.17 $\pm$ 0.08 &  0.55 $\pm$ 0.46 \\
 Ni &  7.63 &  6.23 & (6.25) & --0.31 $\pm$ 0.23 & --0.04 $\pm$ 0.27 & --0.08 $\pm$ 0.15 &  0.05 $\pm$ 0.25 & --0.38 $\pm$ 0.10 & --0.28 $\pm$ 0.13 & --0.28 $\pm$ 0.10 &  0.12 $\pm$ 0.43 \\
 Mg &  7.64 &  7.53 & (7.58) & --0.02 $\pm$ 0.08 & --0.05 $\pm$ 0.12 &  0.13 $\pm$ 0.07 & --0.04 $\pm$ 0.16 & --0.05 $\pm$ 0.10 & --0.18 $\pm$ 0.07 &  0.10 $\pm$ 0.03 & --0.07 $\pm$ 0.17 \\
 Fe &  7.87 &  7.45 & (7.67) & --0.43 $\pm$ 0.20 & --0.18 $\pm$ 0.20 & --0.31 $\pm$ 0.14 & 
 --0.48 $\pm$ 0.15 & --0.28 $\pm$ 0.10 & --0.38 $\pm$ 0.05 & --0.01 $\pm$ 0.10 & --0.28 $\pm$ 0.10 \\
 Si &  8.15 &  7.51 & (7.55) &  0.02 $\pm$ 0.25 & --0.14 $\pm$ 0.13 &  0.10 $\pm$ 0.13 & --0.46 $\pm$ 0.18 & --0.26 $\pm$ 0.10 & --0.35 $\pm$ 0.07 & --0.01 $\pm$ 0.09 & --0.58 $\pm$ 0.32 \\
  S & 10.36 &  7.14 & (7.21) & \ldots & \ldots & \ldots &  0.09$\pm$ 0.32 & \ldots & --0.60 $\pm$ 0.16 & \ldots & --0.98 $\pm$ 1.32 \\
  C & 11.26 &  8.39 & (8.56) & \ldots &  0.62 $\pm$ 0.33 & \ldots &  0.28 $\pm$ 0.23 & \ldots & \ldots & \ldots & --0.17 $\pm$ 0.40 \\
  O & 13.61 &  8.66 & (8.93) &  0.83 $\pm$ 0.34 &  0.31$\pm$ 0.13 &  0.94 $\pm$ 0.26 & --0.32 $\pm$ 0.30 &  0.02 $\pm$ 0.10 & --0.03 $\pm$ 0.13 & \ldots &  0.18 $\pm$ 0.23 \\
  N & 14.53 &  7.78 & (8.05) & \ldots &  0.49 $\pm$ 0.07 & \ldots &  0.20 $\pm$ 0.15 & \ldots & \ldots & \ldots &  0.27 $\pm$ 0.14 \\
 Ar & 15.76 &  6.18 & (6.56) & \ldots &  0.88 $\pm$ 0.21 & \ldots & \ldots & \ldots &  0.10 $\pm$ 0.26 & \ldots &  0.33 $\pm$ 0.54 \\
 Ne & 21.56 &  7.84 & (8.09) & \ldots &  0.61 $\pm$ 0.10 & \ldots &  0.09 $\pm$ 0.13 & \ldots &  0.17 $\pm$ 0.06 & \ldots &  0.66 $\pm$ 0.13 \\
%----------------
\hline
\end{tabular}}
\smallskip
$^a$ Solar photospheric abundances from \citet{asp05}, adopted in
this work, are expressed in logarithmic scale. 
Note that several values have been
updated in the literature since \citet{anders}, also listed in
parenthesis for easier comparison.\\
$^b$ Results adapted from \citet{sanz04}.
\end{table}