\begin{table}%t1
  %\centering
\par
  \caption{Atmospheric parameters and $S/N$ ratios for our sample of field halo stars \citep[from][]{Gra2003a}.}
  \label{FieldData}
  \begin{tabular}{lccccc}
    \hline\hline
    \noalign{\smallskip}
Star ID   & $S/N$@ & $S/N$@ & $T_{\rm eff}$ & $\log g$ & $\xi$           \\
        & 4500 \AA & 6500 \AA &    (K)           &           & (km s$^{-1}$)   \\
    \noalign{\smallskip}
    \hline
    \noalign{\smallskip}
CD-35 0360 & 123  & 204 &  5048  & 4.53  & {\it1.00}  \\
HD 010607  &  97  & 187 &  5757  & 4.01  & 1.50       \\
HD 029907  & 138  & 189 &  5351  & 4.57  & {\it1.00}  \\
HD 031128  & 158  & 196 &  5970  & 4.45  & {\it1.00}  \\
HD 108177  & 145  & 170 &  6133  & 4.41  & {\it1.00}  \\
HD 116064  & 110  & 184 &  5964  & 4.32  & {\it1.00}  \\
HD 120559  & 135  & 151 &  5383  & 4.57  & {\it1.00}  \\
HD 121004  & 138  & 194 &  5583  & 4.37  & {\it1.00}  \\
HD 126681  & 103  & 208 &  5574  & 4.55  & {\it1.00}  \\
HD 132475  & 134  & 201 &  5541  & 3.79  & 1.27       \\
HD 134169  & 115  & 184 &  5850  & 3.95  & 1.10       \\
HD 134439  & 118  & 179 &  4996  & 4.65  & {\it1.00}  \\
HD 134440  & 103  & 196 &  4714  & 4.61  & {\it1.00}  \\
HD 140283  & 151  & 229 &  5657  & 3.69  & 1.42       \\
HD 145417  &  93  & 174 &  4869  & 4.62  & {\it1.00}  \\
HD 159482  & 128  & 153 &  5713  & 4.35  & 0.96       \\
BD+05 3640 &  83  & 134 &  5023  & 4.61  & {\it1.00}  \\
HD 166913  & 151  & 190 &  6070  & 4.17  & 1.10       \\
HD 181743  & 154  & 165 &  5968  & 4.40  & {\it1.00}  \\
HD 188510  & 147  & 235 &  5503  & 4.55  & {\it1.00}  \\
HD 189558  & 104  & 195 &  5668  & 3.79  & 1.36       \\
HD 193901  & 111  & 183 &  5779  & 4.54  & 1.08       \\
HD 194598  & 132  & 175 &  6023  & 4.31  & 1.26       \\
HD 204155  & 105  & 171 &  5772  & 4.03  & 0.98       \\
HD 205650  & 124  & 156 &  5810  & 4.50  & {\it1.00}  \\
    \hline
  \end{tabular}
\end{table}