\begin{table}%T17
\caption{\label{tab17}Lick index external comparisons:
galaxy central values of Lick indices (major axis only).}
\small%\centering
\par
\begin{tabular}{l|c c c c }
\hline
\hline 
\multicolumn{5}{c}{$EW$ ~(\AA) ~and ~$MAG$ ~(mag) ~indices} \\
\hline
       & NGC 1052 &                 & NGC 7796        &            \\
Index  & our      & literature      & our             & literature \\
\hline
Fe4383$^0$
& 5.62 $\pm$ 0.30 & 6.11 $\pm$ 0.45 & 4.97 $\pm$ 0.35 & -- \\
Ca4455$^0$
& 2.36 $\pm$ 0.30 & 2.10 $\pm$ 0.21 & 2.66 $\pm$ 0.36 & -- \\
Fe4531$^0$
& 3.36 $\pm$ 0.47 & 3.62 $\pm$ 0.30 & 3.22 $\pm$ 0.35 & -- \\
Fe4668$^0$
& 7.65 $\pm$ 0.35 & 8.50 $\pm$ 0.44 & 8.45 $\pm$ 0.41 & -- \\
Mg~ b$^0$
& 3.83 $\pm$ 0.23 & 5.63 $\pm$ 0.14 & 4.67 $\pm$ 0.25 & 5.20 $\pm$ 0.25 \\
Fe5270$^0$
& 2.25 $\pm$ 0.17 & 2.81 $\pm$ 0.04 & 2.69 $\pm$ 0.20 & 3.63 $\pm$ 0.05 \\
Fe5335$^0$
& 2.39 $\pm$ 0.21 & 2.74 $\pm$ 0.07 & 2.30 $\pm$ 0.26 & 2.98 $\pm$ 0.06 \\
Fe5406$^0$
& 1.85 $\pm$ 0.15 & 1.82 $\pm$ 0.02 & 1.73 $\pm$ 0.18 & 1.87 $\pm$ 0.05 \\
Fe5709$^0$
& 1.00 $\pm$ 0.16 & 0.98 $\pm$ 0.02 & 0.76 $\pm$ 0.18 & 1.01 $\pm$ 0.04 \\
Fe5782$^0$
& 0.90 $\pm$ 0.17 & 0.93 $\pm$ 0.02 & 0.62 $\pm$ 0.19 & 1.02 $\pm$ 0.04 \\
Na~ D$^0$
& 5.52 $\pm$ 0.11 & 6.10 $\pm$ 0.03 & 4.58 $\pm$ 0.13 & 5.48 $\pm$ 0.06 \\
$\langle {\rm Fe}\rangle^0$
& 2.32 $\pm$ 0.21 & 2.78 $\pm$ 0.02 & 2.49 $\pm$ 0.33 & 3.04 $\pm$ 0.37 \\
H$\beta$$^0$
& --              & 1.22 $\pm$ ?    & 1.57 $\pm$ 0.19 & 1.64 $\pm$ 0.16 \\
Mg$_1^0$
& 0.149 $\pm$ 0.004 & 0.193 $\pm$ 0.001 & 0.137 $\pm$ 0.005 & 0.165 $\pm$ 0.002 \\
Mg$_2^0$
& 0.293 $\pm$ 0.004 & 0.303 $\pm$ 0.017 & 0.326 $ \pm$ 0.005 & 0.267 $\pm$ 0.051 \\
\hline
\end{tabular}
\label{centralinds}
\end{table}