\begin{table}%t1
\caption{Log of observations.}\label{table:observations} 
%\centering
\par
\begin{tabular}{llcrcl} 
\hline  \hline
 Instrument & Image ID & Date & $\lambda$ Range &  $t_{\rm exp}$ & Remarks \\ 
           &       &          &  [\AA]     &  [min] & \\ 
\hline 
  CTIO 4 m Ret.2$^{a}$   & & 31/12/94 & 3184--7463  & 5.0 &   
                                          2 and 10\arcsec\ slit width \\ 
\hline 
 IUE SWP &  54313 & 06/04/95 & 1152--1978 & 135 & Large ap., low res.\\  
 \hline 
 HST STIS G140L&o57n02010&07/01/99&1124--1730&36.36 & FUV-MAMA \\ 
 HST STIS G140L&o57n02020&07/01/99&1124--1730&22 & FUV-MAMA \\ 
 HST STIS G230L&o57n02030&7/01/99&1580--3160&25.5 & NUV-MAMA \\ 
 HST STIS G230L&o57n02040&7/01/99&1580--3160&54 & NUV-MAMA \\ 
 HST STIS G430L&o57n03010&30/12/98&2900--5710&37.86 & CCD \\ 
 HST STIS image&o57n02iuq &06/01/99&5852&3.3 & CCD, acquisition im.\\ 
 HST STIS image&o57n03bqq &30/12/98&5852&3.3 & CCD, acquisition im.\\ 
\hline 
\multicolumn{6}{l}{$^a$ CTIO 4 m with Reticon detector and grating KPGL2.}\\ 
\multicolumn{6}{l}{Also in HST archives FOS spectra Y2N30302T, Y2N30303T, Y2N30304T, 1150--4800~\AA\ reported by \citet{vas1:98}.}\\  
\end{tabular}
\end{table}