\begin{table}%t3 \caption{VLT observation log for GRB~071227. Magnitudes are in the Vega system and are not corrected for Galactic absorption. } %\centerline { \begin{tabular}{ccccccc} \hline\hline Mean time & Exposure time & Time since GRB & Seeing & Instrument & Magnitude & Filter / grism \\ (UT) & (s) & (days) & (\arcsec) & & & \\ \hline 2007 Dec. 28.13346 & $2 \times 120$ & 0.29055 & $0.7$ & VLT/FORS2 & $23.24 \pm 0.08$ & $R$ \\ 2007 Dec. 31.21576 & $3 \times 180$ & 3.37133 & $0.7$ & VLT/FORS2 & $23.88 \pm 0.17$ & $R$ \\ 2008 Jan 03.11081 & $5 \times 180$ & 6.26790 & $0.8$ & VLT/FORS2 & $23.71 \pm 0.16$ & $R$ \\ 2008 Jan. 07.09081 & $5 \times 180$ & 10.24790 & $0.8$ & VLT/FORS2 & $24.02 \pm 0.21$ & $R$ \\ 2008 Jan. 16.22578 & $5 \times 180$ & 19.38287 & $0.7$ & VLT/FORS2 & $23.64 \pm 0.14$ & $R$ \\ 2008 Jan. 18.09430 & $10 \times 180$ & 21.25139 & $0.8$ & VLT/FORS2 & $23.91 \pm 0.19$ & $R$ \\ 2008 Jan. 23.06066 & $10 \times 180$ & 26.21775 & $0.9$ & VLT/FORS2 & $23.83 \pm 0.31$ & $R$ \\ 2008 Feb. 06.10412 & $10 \times 180$ & 40.26121 & $1.1$ & VLT/FORS2 & $23.69 \pm 0.13$ & $R$ \\ \hline 2007 Dec. 28.21424 & $4 \times 1800$ & 0.37133 & $0.7$ & VLT/FORS2 & --- & 300V+GG375 \\ \hline \end{tabular}} \medskip Magnitudes from Dec. 31.2 onwards are computed within an annulus with a radius of about $1\farcs5$ centered on the afterglow position, and are therefore not representative of the host galaxy. Errors are given at a $1\sigma$ confidence level. \label{tab_log3} \end{table}