\begin{table}%t2
\caption{\label{photval}Optical photometry of SN~2007rt.}
%\centerline
 {\small \begin{tabular}{lccccccccccc}
\hline \hline
Date & Phase(days) & $U$ & $U_{\rm err}$ & $B$&$B_{\rm err}$&$V$ &$V_{\rm err}$ & $R$ & $R_{\rm err}$ & $I$ & $I_{\rm err}$ \\
\hline  
28--11--2007 & 85 & & & 17.600 & 0.388 & 17.177 & 0.224 & 16.862 & 0.297 &  &  \\ 
02--12--2007 & 89 & & & 17.624 & 0.172 & 17.263 & 0.186 & 16.900 & 0.222 && \\
05--12--2007 & 92 & &  &  & & 17.285 & 0.090 & & & & \\
09--12--2007 & 96 && & & & & & 16.935 & 0.273 &        &       \\
15--12--2007 &102 & 17.191 & 0.027 & 17.670 & 0.019 & 17.327 & 0.025 & 16.977 & 0.021 & 16.803 & 0.033 \\
19--12--2007 &106 &&& 17.648 & 0.046 & 17.334 & 0.023 & 16.943 & 0.098 & 16.744 & 0.150 \\ 
13--01--2008 &131& 17.541  & 0.026 & 17.885 & 0.018 & 17.490 & 0.021 & 17.057 & 0.021 & 17.042 & 0.026 \\
11--02--2008 &160& 17.623  & 0.039 & 17.968 & 0.020 & 17.602 & 0.023 & 17.077 & 0.022 & 17.069 & 0.030 \\
29--03--2008 &207& & & 18.166 & 0.054 & 17.882 & 0.090 & 17.171 & 0.066 & 17.321 & 0.070 \\
30--03--2008 &208 & 17.808 & 0.041 & 18.160 & 0.039 & 17.881 & 0.097 & 17.176 & 0.028 & 17.329 & 0.118 \\
01--05--2008 &240 &  & & 18.289 & 0.028 & 18.001 & 0.045 & 17.339 & 0.047 & 17.331 & 0.059\\
03--06--2008 &273 & 18.059 & 0.073 & 18.335 & 0.034 & 18.200 & 0.047 & 17.516 & 0.061 & 17.531 & 0.101 \\
07--07--2008 &307 & 18.206 & 0.051 & 18.601 & 0.049 & 18.433 & 0.082 & 17.618 & 0.059 & 17.580 & 0.087 \\
05--12--2008 &458 &   &   &   &   &   &   & 18.565 & 0.070 & &  \\
22--12--2008 &475 & & & 20.175 & 0.102 & 19.948  & 0.082& 18.622 & 0.043 & 18.932 &   0.060\\
13--01--2009 &497 &   &    &    &   &   &  & 18.881 & 0.090 & 19.088 &0.258 \\
20--01--2009 &506 &  & &  &  &  & & 18.866 & 0.148 & & \\
23--01--2009 &507 & 19.675  &  0.071&  20.543& 0.079&20.250&0.149&18.884 & 0. 096&  & \\
19--03--2009 &562 & & &21.179&0.103&21.012&0.095&19.610&0.071&19.600 &0.055\\
\hline
\end{tabular}}
\medskip
The phase is given relative to the explosion date,  believed to be 81~days prior to the discovery date on 24th~November 2007.
\end{table}