\begin{table}%t2  
\caption{\label{tab:obslog} Log of the observations presented in this work.}
%\centerline
 {
\begin{tabular}{lcccccccc} 
\hline\hline\noalign{\smallskip}
Target    & Date & Start time & End time & Telescope and & Optical &  Number of   & Exposure & Mean      \\
          & (UT) &  (UT)      &  (UT)    &  instrument   & element & observations & time (s) & magnitude \\
\hline
SDSS~J0310 & 2009 01 25 & 00:56 & 03:40 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 105 &     60 & 21.3 \\
[2pt]
SDSS~J0743 & 2009 01 23 & 01:36 & 03:37 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  80 & 40--60 & 22.3 \\
SDSS~J0743 & 2009 01 23 & 05:39 & 06:43 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  42 &     60 & 22.2 \\
[2pt]
SDSS~J0746 & 2009 01 24 & 01:01 & 03:44 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 123 & 30--60 & 20.2 \\
SDSS~J0746 & 2009 01 24 & 06:09 & 07:12 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  59 &     30 & 20.4 \\
[2pt]
SDSS~J0750 & 2009 01 22 & 00:53 & 05:27 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 255 &     30 & 19.2 \\
SDSS~J0750 & 2009 01 23 & 01:07 & 01:30 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  22 &     30 & 19.3 \\
SDSS~J0750 & 2009 01 26 & 02:50 & 03:33 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  41 &     30 & 19.4 \\
SDSS~J0750 & 2009 01 27 & 00:57 & 01:37 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  34 &     40 & 19.5 \\
SDSS~J0750 & 2009 02 16 & 22:04 & 22:31 & WHT~/~Aux    & $V$ filter             & 164 &      5 & 18.9 \\
[2pt]
SDSS~J0758 & 2009 01 26 & 00:55 & 02:46 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 150 &     10 & 17.3 \\
SDSS~J0758 & 2009 01 26 & 04:37 & 04:57 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  28 &     10 & 17.3 \\
[2pt]
SDSS~J0906 & 2008 01 18 & 04:07 & 06:12 & INT~/~WFC    & $g$ filter             &  69 &     70 & 18.9 \\
SDSS~J0906 & 2008 01 20 & 03:15 & 06:01 & INT~/~WFC    & $g$ filter             & 112 &     60 & 18.4 \\
SDSS~J0906 & 2009 01 24 & 03:49 & 06:04 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 125 &     30 & 19.4 \\
SDSS~J0906 & 2009 01 24 & 07:16 & 09:17 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 113 &     30 & 19.4 \\
SDSS~J0906 & 2009 01 27 & 01:43 & 03:28 & NTT~/~EFOSC2 & $R$ filter             &  85 &     40 & 19.4 \\
[2pt]
SDSS~J0924 & 2009 01 25 & 03:46 & 07:29 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter & 207 &     30 & 21.1 \\
SDSS~J0924 & 2009 01 26 & 05:00 & 05:21 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  20 &     30 & 21.4 \\
SDSS~J0924 & 2009 01 27 & 05:04 & 05:34 & NTT~/~EFOSC2 & $B_{\rm Tyson}$ filter &  29 &     30 & 21.3 \\
SDSS~J0924 & 2009 02 16 & 23:51 & 00:10 & WHT~/~Aux    & $V$ filter             &  75 &     10 & 18.9 \\
[2pt]
SDSS~J1152 & 2009 02 17 & 00:16 & 02:36 & WHT~/~Aux    & $V$ filter             & 564 &     10 & 19.6 \\
[2pt]
SDSS~J1524 & 2009 05 06 & 02:58 & 05:43 & WHT~/~Aux    & $V$ filter             & 756 &     10 & 19.1 \\
\hline 
\end{tabular}}
\par
\tablefoot{The mean magnitudes are formed from observations outside eclipses only.}
 \end{table}