\begin{table}%t1%\centering
\par

\caption{\label{datasets} Spectroscopic datasets in the visual range.}
$$
\begin{tabular}{cc@{--}lc@{--}lllrrrr}
\hline\noalign{\smallskip}
\hline
\rule{0ex}{2.5ex} Data        & \multicolumn{2}{c}{Observing} & \multicolumn{2}{c}{JD}         &                                     &                                    & 
 \multicolumn{1}{c}{No.\ of} & \multicolumn{1}{c}{Resolving} & \multicolumn{1}{c}{Spectral}   &                              \\
\par
set                           & \multicolumn{2}{c}{season}    & \multicolumn{2}{c}{2~400~000+}   & \raisebox{1.5ex}[1.5ex]{Telescope}  & \raisebox{1.5ex}[1.5ex]{Instrument} & 
\multicolumn{1}{c}{spectra}   &\multicolumn{1}{c}{power}      & \multicolumn{1}{c}{range [\AA]}& \raisebox{1.5ex}[1.5ex]{Ref.} \\
%
\hline
A & \multicolumn{2}{c}{1991}    & \multicolumn{2}{c}{48~347} & Heidelberg 0.9~m  & FLASH          &   1     & 20~000 & 4050--6780 & 0 \\  
B & 1992       & 2007          & 49~049    & 51~486        & Ond\v{r}ejov 2~m  & slit spectr.   &  43     &  8500 & 6300--6700 & 1 \\ 
C & \multicolumn{2}{c}{1994~\&~2000}  &  \multicolumn{2}{c}{49~592~\&~51~572}  & OHP 1.93~m          & {\sc Elodie}     &   3  & 45~000 & 3850--6800 & 2 \\
D & 2000 & 2003 & 51~045 & 52~726 & Ond\v{r}ejov 2~m     & \her             &  23  & 20~000 & 3700--8600 & 1 \\
E & 2005 & 2008 & 53~399 & 54~714 & ESO/MPI 2.2~m       & \fer             &  25  & 48~000 & 3700--9000 & 1, 0 \\
F & 2000 & 2008 & 51~850 & 54~174 & Schmidt-Cassegrain & Slitless-Grating & 129  & 14~000 & 6500--6700 & 3 \\
G & 2006 & 2007 & 54~005 & 54~515 & SCT 0.3~m           & LHIRES           &  12  & 13~425 & 6520--6700 & 4 \\ 
H &  \multicolumn{2}{c}{2006}  &  \multicolumn{2}{c}{54~387~\&~54~083}    & Celestron 11       & LHIRES           &   3  & 17~000 & 6520--6620 & 5 \\ 
I &  \multicolumn{2}{c}{2006}  &  \multicolumn{2}{c}{54~169~\&~54~200} & Takahashi TSC225   & LHIRES           &   7  & 17~000 & 3000--7000 & 6 \\ 
J & 2007 & 2008 & 54~162 & 54~550 & Schmidt-Cassegrain & Slitless-Grating &  32  & 14~000 & 6500--6700 & 7 \\ 
K & \multicolumn{2}{c}{2007~\&~2008}  & \multicolumn{2}{c}{54~442~\&~54~527}  & Newton             & LHIRES           &   2  &  7~000 & 6490--6700 & 8 \\
L & \multicolumn{2}{c}{2008}  & \multicolumn{2}{c}{54~532}           & Celestron C14      & LHIRES           &   2  & 17~000 & 6520--6610 & 9 \\ 
M & 2007 & 2008 & 54~406 & 54~515 & Meade LX200        & LHIRES           &  10  & 17~000 & 6520--6610 & 10 \\ 
N & \multicolumn{2}{c}{2008} & 54~106 & 54~359 & C11                & LHIRES           &   3  & 17~000 & 4000--8000 & 11 \\ 
O & \multicolumn{2}{c}{2007} &         \multicolumn{2}{c}{54~331}   & OHP ED120          & LHIRES           &   1  & 17~000 & 6400--6800 & 12 \\ 
P & 2006 & 2008 & 54~021 & 54~714 & ESO/MPG 2.2~m       & \fer             &  18  & 48~000 & 3700--9000 & 0 \\
Q & 1999 & 2007 & 51~489 & 54~433 & Ritter 1~m          & echelle          &  61  & 26~000 & 4600--6700 & 0 \\ 
R & \multicolumn{2}{c}{2007}  &        \multicolumn{2}{c}{54~384}    & OPD/LNA            & ECASS            &   1  & 16~000 & 6500--6620 & 0 \\ 
\hline
\end{tabular}
$$
\smallskip
References: 1 -- \citet{2006AetA...459..137R}; 
            2 -- BeSS,observer: C.~Neiner;
            3.-- E.~Pollmann, data used in \citet{2008IBVS.5813....1P}, private communication;
            4 -- BeSS observer: B.~Mauclaire;
            5 -- BeSS observer: C.~Buil;
            6 -- BeSS observer: E.~Barbotin;
            7 -- BeSS observer: E.~Pollmann;
            8 -- BeSS observer: J.~Guarro Fl\'{o};
            9 -- BeSS observer: J.~Ribeiro;
           10 -- BeSS observer: J.-N.~Terry;
           11 -- BeSS observer: O.~Thizy;
           12 -- BeSS observer: V.~Desnoux;
            0 -- this paper.
\end{table}