\begin{table}%T1 \caption{\label{tbl:log_obs}Log of photometric and spectroscopic observations. The filter and the cycle time ($\Delta t$) is indicated for the photometric runs.} \small %\centering \par \begin{tabular}{ccrccclll} \hline\hline\noalign{\smallskip} Date & UT start & Length & $\Delta t$ [s] & Filter & Passband [\AA] & Telescope & Instrument & Observer \\ \hline 2004-01-28 & 05:07:43 & 1000~s & -- & -- & 3620--6895 & Bok~ & B\&C & BG \\ 2007-10-24 & 02:15:00 & $02^{\rm h}13^{\rm m}$ & 15 & $W$ & 4000--7150 & {\sc not} & {\sc alfosc}& RO \\ 2007-12-15 & 01:36:25 & $02^{\rm h}07^{\rm m}$ & 20 & $B$ & 3600--5200 & {\sc not} & {\sc alfosc}& R\O \\ 2007-12-15 & 03:19:32 & $05^{\rm h}29^{\rm m}$ & 34 & $B$ & 3600--5200 & Kuiper & M{\sc ont}4{\sc k}& BG \\ 2007-12-16 & 23:23:16 & $02^{\rm h}20^{\rm m}$ & 20 & $B$ & 3600--5200 & {\sc not} & {\sc alfosc}& R\O \\ 2007-12-30 & 06:16:04 & 1200~s & -- & -- & 3620--6895 & Bok~ & B\&C & BG \\ 2007-12-30 & 06:42:10 & 1125~s & -- & -- & 3620--6895 & Bok~ & B\&C & BG \\ 2007-12-31 & 06:24:36 & 950~s & -- & -- & 3620--6895 & Bok~ & B\&C & BG \\ 2008-01-01 & 05:46:06 & 1100~s & -- & -- & 3620--6895 & Bok~ & B\&C & BG \\ 2008-01-12 & 02:58:48 & 200~s & -- & -- & 3880--4380 & ESO/NTT & {\sc emmi} & SG \\ 2008-01-13 & 02:52:15 & 200~s & -- & -- & 3880--4380 & ESO/NTT & {\sc emmi} & SG \\ \hline \end{tabular} \end{table}