\begin{table}%t1
%\centering
\par
\caption{CCD observations of \object{DW UMa}.}
\par
\begin{tabular}{lccc}
\hline
\hline
\noalign{\smallskip}
 Date      & Start & duration  &  mid-eclipse  \\
                  &  HJD-2~450~000 & [h] & [HJD]    \\
\par
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{Rozhen 2-m, Johnson $V$ filter }\\
\hline
\noalign{\smallskip}
2000 Jan. 10  & 1554.34 & 7.13 & 1554.33889  \\
                          & & & 1554.47524  \\
                          & & & 1554.61264  \\
2000 Jan. 13  & 1557.44 & 4.69 & 1557.48099  \\
                          & & & 1557.61743  \\
2002 Jan. 11  & 2286.26 & 1.79 & 2286.27706  \\
2002 Jan. 13  & 2288.32 & 7.50 & 2288.32641  \\
             &         &      & 2288.46296  \\
             &         &      & 2288.59911  \\
2002 Jan. 14  & 2289.40 & 4.44 & 2289.41825  \\
             &         &      & 2289.55524  \\
2002 Feb. 9   & 2315.25 & 9.95 & 2315.37403  \\
             &         &      & 2315.51110  \\
             &         &      & 2315.64799  \\
2002 Feb. 17  & 2323.22 & 8.86 & 2323.29749  \\
             &         &      & 2323.43444  \\
             &         &      & 2323.57099  \\
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{ROB Schmidt telescope, unfiltered }\\
\hline
\noalign{\smallskip}
2000 Mar. 22  & 1626.38 & 5.50 & 1626.46748 \\
                          & & & 1626.60419 \\
2002 Feb. 16  & 2322.39 & 3.96 & 2322.47774 \\
2002 Apr. 8   & 2373.45 & 4.24 & 2373.56879 \\
2002 Apr. 10  & 2375.38 & 4.43 & 2375.48054 \\
2002 Apr. 24  & 2389.38 & 4.63 & 2389.41500 \\
                          & & & 2389.55209 \\
2003 Mar. 16  & 2715.52 & 2.68 &            \\
2003 Mar. 22  & 2721.51 & 4.23 & 2721.64166 \\
2003 Apr. 15  & 2745.38 & 5.00 & 2745.41090 \\
                        &  &  & 2745.54838 \\
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{Hoher List 1-m, unfiltered }\\
\hline
\noalign{\smallskip}
2000 Feb. 10  & 1585.50 & 3.26 & 1585.62166 \\
2000 Feb. 11  & 1586.60 & 3.80 & 1586.71482 \\
2001 Jan. 15  & 1925.37 & 4.69 & 1925.49886 \\
2001 Jan. 16  & 1926.58 & 4.64 & 1926.59172 \\
             &         &      & 1926.72804 \\
2003 Mar. 04  & 2703.44 & 1.52 & 2703.47304 \\
2003 Mar. 06  & 2705.34 & 8.31 & 2705.52281 \\
             &         &      & 2705.65868 \\
2003 Mar. 07  & 2706.30 & 7.47 & 2706.34213 \\
\hline
\noalign{\smallskip}
\multicolumn{4}{c}{Kryoneri 1.2-m, unfiltered }\\
\hline
\noalign{\smallskip}
2003 Jun. 02  & 2793.31 & 2.89 & 2793.36068 \\
\hline
\end{tabular}
\label{obs}
\end{table}