\begin{table}%T1 \caption{\label{tab1}Log of photometric observations for \sdss. } \small%\centering \par \begin{tabular}{ccccccc} \hline\hline ${\rm Date}$ & ${\rm Tel}$ & ${\rm Filter}$ & $t_{\rm {int}}$ & $N_{\rm {obs}}$ & $\phi_{\rm {ini}}$ & $\phi_{\rm {fin}}$\\ \hline 04 Jan. 2007 & IAC80 & $I$ & 180 & 74 & 0.805 & 1.278 \\ 26 Jan. 2007 & AIP70 & $V$ & 180 & 19 & 0.041 & 0.156 \\ 13 Feb. 2007 & IAC80 & $V$ & 70 & 191 & 0.607 & 1.202 \\ 14 Feb. 2007 & IAC80 & $V$ & 70 & 221 & 0.525 & 1.292 \\ 12 Mar. 2007 & AIP70 & $I$ & 120 & 181 & 0.031 & 0.946 \\ 13 Mar. 2007 & AIP70 & $I$ & 120 & 153 & 0.377 & 1.343 \\ 14 Mar. 2007 & AIP70 & $I$ & 120 & 49 & 0.786 & 1.040 \\ 15 Mar. 2007 & AIP70 & $R$ & 120 & 73 & 0.683 & 1.023 \\ 26 Mar. 2007 & AIP70 & $I$ & 120 & 45 & 0.994 & 1.179 \\ 21 May 2007 & AIP70 & $I$ & 90 & 59 & 0.907 & 1.097 \\ 06 May 2008 & IAC80 & $R$ & 120 & 32 & 0.913 & 1.049 \\ \hline \end{tabular} \end{table}