\begin{table}%t1
%\centering
\par
\caption {\label{tab:obslog}Log of the observations presented in this work.
The mean magnitudes are calculated excluding observations taken during eclipse.}
\begin{tabular}{lccccccc} 
\hline\hline
Date & Start time & End time & Telescope and & Optical  & Number of   & Exposure & Mean \\
\    &  (UT)      &  (UT)    &  instrument   & element  &observations & time (s) & magnitude   \\
\hline
2008 01 04 & 00:11 & 01:49 & WHT~/~ISIS        & R600B R316R gratings &  10 &    600 & \\
2008 01 04 & 04:43 & 05:50 & WHT~/~ISIS        & R600B R316R gratings &   7 &    600 & \\
2008 01 05 & 00:48 & 06:46 & WHT~/~ISIS        & R600B R316R gratings &  62 &    300 & \\
2008 02 01 & 02:31 & 05:41 & NOT~/~ALFOSC      & Wide-$V$ filter      & 197 & 10--60 & 18.8 \\
2008 03 14 & 00:06 & 03:07 & CAHA 2.2~m/CAFOS & unfiltered           & 235 & 20--30 & 18.5 \\
2008 03 14 & 20:55 & 02:24 & CAHA 2.2~m/CAFOS & unfiltered           & 199 & 20--30 & 19.0 \\
2008 03 15 & 22:56 & 02:18 & CAHA 2.2~m/CAFOS & unfiltered           & 312 & 20--30 & 18.4 \\
2008 12 21 & 03:17 & 05:17 & NOT~/~ALFOSC      & Wide-$V$ filter      & 362 &     10 & 18.7 \\
\hline \end{tabular} \end{table}