\begin{table}%t4
%\centering
\par
\caption{Unidentified photospheric lines in the FUSE and HST spectra
(rest wavelengths). We remark whether the lines are detectable in
high-resolution spectra of other PG~1159 stars or H-rich central stars as
well.}\label{tab:unidentified photospheric lines} 
\small\begin{tabular}{ccc} 
\hline \hline \noalign{\smallskip}
Wavelength / \AA  &   Remark & Possible identification\\
\hline
\noalign{\smallskip} 
927.30       &              & \\
939.57       &              & \\
965.35       &              & \\
996.58       &              & \\
999.42       &              & \\
1000.08       &              & \\
1006.20       &              & \\
1041--1047       &  some features            & \\
1052.00       &              & \\
1055.66	       &              & \\
1057.74       &              & \\
1110--1120       &  some features            & \\
1125.68       &              & \\
1127.57       &              & \\
1129.5        &              & \\
1131.17       &              & \\
1131.80       &              & \\
1139.04       &              & \\
1141.60       &              & \\
1148.42       &              & \\
1148--1152    & K1-16, RX~J2117+3412, Lo4, PG1144+005, PG1707+427 & broad dip, \ion{C}{iv} 4--11\\
1155-1160       &  some features            & \\
1264.15, 1264.95, 1265.95 & NGC 7094, H-rich CSPN \\
1267.65       & NGC 7094, H-rich CSPN & 1267.64 \ion{Si}{v} ${\rm  3s ^1P^o}$--${\rm  3p^{3}P}$, no f-value available \\
1270.25       &     NGC 246, NGC 7094, H-rich CSPN \\
1298.95       &    H-rich CSPN \\
1307.60       &   H-rich CSPN \\
1356.00       &   H-rich CSPN \\
1366.40       &   RX~J2117.1+3412  (HST/GHRS, Werner \etal 1996)\\
1406.45       &   H-rich CSPN \\
1480.20       &   NGC 246, not in H-rich CSPN \\
1486.75       &  H-rich CSPN \\
1645.00, 1645.60   &   NGC 7094, H-rich CSPN       \\ 
1679.55       &  NGC 7094, H-rich CSPN \\
\hline
\end{tabular}
\end{table}