\documentstyle{l-aa}
\begin{document}
\begin{table*}
\caption{Program star (v), mean epoch of observation (1900.0 +), comparison 
(c) and check (ck) stars, standard deviations (in millimagnitudes) for the v-c 
($\sigma_\mathrm{v}$) and ck-c ($\sigma_\mathrm{ck}$) V-band differential 
magnitudes for each series of N nights, peak-to-peak ($\Delta$V) amplitude of 
the V-band light curve (in magnitudes) and period (P) of variability}
\renewcommand{\arraystretch}{.95}
\begin{tabular}{|ll|c|l|l|c|c|c|c|l|}
\hline
\multicolumn{2}{|c|}{Program star} & Epoch & \multicolumn{1}{|c}{Comparison} & 
\multicolumn{1}{|c|}{Check} & $\sigma_\mathrm{v}$ & $\sigma_\mathrm{ck}$ & N & 
$\Delta V$ & \multicolumn{1}{c|}{P} \\
\multicolumn{2}{|c|}{(v)} & & \multicolumn{1}{|c|}{(c)} & 
\multicolumn{1}{|c|}{(ck)} & & & & & 
\multicolumn{1}{|c|}{(d)} \\
\hline
HD 1835   &= BE Cet  & 94.92 & HD 1388  & HD 2488  & 13 & 3 &11&.04& 7.655 \\
HD 7172   &          & 94.92 & HD 7220  & HD 7629  & 24 & 3 &10&.07& 3.15  \\
HD 8358   &= BI Cet  & 94.68 & HD 8405  & HD 8615  & 17 & 7 &17&.05& 0.520 \\
HD 8358   &= BI Cet  & 94.92 & HD 8615  & HD 8405  & 22 & 5 & 7&.07& 0.520 \\
HD 8435   &= BC Phe  & 94.92 & HD 8617  & HD 9896  & 15 & 3 & 9&.05& 0.657 \\
HD 9902   &= BG Psc  & 94.92 & HD 9520  & HD 8262  & 11 & 5 &11&.03& 7.60  \\
HD 16157  &= CC Eri  & 94.92 & HD 16371 & SAO 215945&23 & 4 &11&.07& 1.56145\\
SAO 130113&= BY Cet  & 94.92 & SAO 130102&HD 16619 & 17 & 6 &11&.05& 2.60  \\
HD 18131  &          & 94.92 & HD 18194 & HD 18618 &  3 & 1 & 4&.01&       \\
1E0315.7-1955&= ES Eri&94.92 & HD 20492 & HD 20129 & 37 & 4 &11&.11& 4.7   \\
HD 32918  &= YY Men  & 94.92 & HD 33763 & HD 33747 & 49 & 6 &11&.14& 9.5476\\
EXO 052707-3329.2&= UX Col&94.92&HD 35995&HD 35322 & 10 & 3 &11&.04& 2.29  \\
HD 36705  &= AB Dor  & 94.92 & HD 35230 & HD 36313 & 30 & 5 & 9&.09& 0.51423\\
EXO 053237-0510.1&= V1321 Ori&94.92&HD 36003&HD 36235&61& 5 &11&.17& 5.7   \\
HD 291095 &= V1355 Ori&94.92 & HD 41433 & HD 40347 & 60 & 4 &11&.19& 3.82  \\
SAO 151224&= HY CMa  & 94.92 & HD 43306 & HD 44007 & 48 & 4 & 6&.13& 4.977 \\
HD 43989  &= V1358 Ori&94.92 & HD 44517 & HD 44019 & 16 & 5 &10&.05& 1.16  \\
HD 197481 &= AU Mic  & 94.73 & HD 197237& HD 197339& 56 & 3 & 7&.15& 4.865 \\
HD 217479 &= FK Aqr  & 94.73 & HD 214046& HD 214380& 17 & 6 & 7&.05& 4.39  \\
\hline
\end{tabular}
\end{table*}


\begin{table}
\caption{Mean atmospheric extinction coefficients for La Silla site, 
obtained over the intervals 21 - 28 September 1994 (1994.73) and 
25 November - 05 December 1994 (1994.92)}
\begin{tabular}{|c|c|c|c|c|c|c|}
\hline
            & Epoch   &  U  &  B  &  V  &  R  &  I  \\
\hline
mag/airmass & 1994.73 &.433 &.210 &.121 &.074 &.042 \\
mag/airmass & 1994.92 &.439 &.213 &.129 &.090 &.049 \\
\hline
\end{tabular}
\end{table}


\begin{table*}
\caption{Brightest magnitude ($V_\mathrm{m}$) and colours 
for the program stars measured at the given Epoch (1900.0+), period (P) of
variability (days), spectral 
classification (Spectral Type) inferred by using the ASC method (see text), 
distance from the Hipparcos satellite database
(D$_\mathrm{T}$), photometric distance from the adopted spectral 
classification (d$_\mathrm{ph}$) and $V$-band brightest magnitude ever observed 
({\it $V_\mathrm{max}$})}
\renewcommand{\arraystretch}{.95}
\small
\begin{tabular}{|l|c|r|l|l|l|l|l|l|r|r|r|}
\hline
\multicolumn{1}{|c|}{Program Star} & Epoch &
\multicolumn{1}{|c|}{V$_\mathrm{m}$} & \multicolumn{1}{|c|}{U$-$B~} & 
\multicolumn{1}{|c|}{B$-$V~} & \multicolumn{1}{|c|}{V$-$R} & 
\multicolumn{1}{|c|}{V$-$I} & \multicolumn{1}{|c|}{P} & 
\multicolumn{1}{c|}{Spectral Type} & 
\multicolumn{1}{|c|}{D$_\mathrm{T}$} & \multicolumn{1}{c|}{d$_\mathrm{ph}$} & 
\multicolumn{1}{|c|}{V$_\mathrm{max}$} \\
\hline
\object{BE Cet}   &94.92&6.38&0.22&0.66&0.36&0.69&  7.655 &
G4 V             & 20.4& 20.2& 6.35 \\
\object{HD 7172}  &94.92&9.64&0.05&0.62&0.34&0.68&  3.15  &
G2/3 V           &$>$27& 100 & 9.64 \\
\object{BI Cet}   &94.92&8.18&0.17&0.71&0.42&0.85&  0.520 &
G6 V/IV + G6 V/IV&  66 & 65  & 8.08 \\
\object{BC Phe}   &94.92&8.77&0.31&0.75&0.43&0.83&  0.657 &
G7 V/IV + G3:V   & 118 & 118 & 8.69 \\
\object{BG Psc}   &94.92&8.68&0.18&0.68&0.38&0.78&  7.60  &
G3 V/IV + G4 V/IV& 44: & 115 & 8.63 \\
\object{CC Eri}   &94.92&8.80&1.09&1.38&0.88&1.84&  1.56145 &
K7 V + M3 V      & 11.5& 11.5& 8.70 \\
\object{BY Cet}   &94.92&9.58&0.29&0.79&0.47&0.94&  2.60  &
G7 V + K5: V     &$>$23&  75 & 9.52 \\
\object{HD 18131} &94.92&7.36&0.72&0.98&0.51&0.97&        &
K1 IV + WD       & 104 &  96 & 7.32 \\
\object{ES Eri}   &94.92&10.65&0.25&0.75&0.44&0.91& 4.7   &
G6: PMS + ?      &     & 310:&10.65 \\
\object{YY Men}   &94.92&8.04&0.70&1.07&0.59&1.16&  9.5476&
K1 III           & 292 & 219 & 7.93 \\
\object{UX Col}   &94.92&10.46&0.80&1.06&0.65&1.25& 2.29  &
K3/5 PMS         &     & 120:&10.46 \\
\object{AB Dor}   &94.92&6.82&0.38&0.82&0.48&0.95&  0.51423&
K0 V             & 14.9&  15 & 6.75 \\
\object{V1321 Ori}&94.92&10.59&0.85&1.29&0.74&1.46& 5.7   &
K3 wTTS          &     & 500:&10.50 \\
\object{V1355 Ori}&94.92&9.12&0.57&0.95&0.54&1.06&  3.82  &
K2 V/IV + G8:V   & 43: & 100:& 8.97 \\
\object{HY CMa}   &94.92&9.31&0.64&1.01&0.61&1.18&  4.977 &
K3 V/IV + K1 V/IV&$>$59& 176 & 9.14 \\
\object{V1358 Ori}&94.92&7.91&0.06&0.57&0.33&0.64&  1.16  &
F9 V             & 50  &  59 & 7.91 \\
\object{AU Mic}   &94.73&8.60&1.09&1.43&0.94&2.00&  4.865 &
M1 Ve            & 9.9 & 7.6 & 8.59 \\
\object{FK Aqr}   &94.73&9.10&1.07&1.50&0.97&2.20&  4.39  &
M1/2 Ve + M1/2 Ve& 8.6 & 8.1 & 8.98 \\
\hline
\end{tabular}
\end{table*}


\begin{table}
\caption{$V$ magnitude and colours for the c and ck stars obtained at ESO. 
Errors are of the order of 0.01 magnitudes. The symbol ":" denotes errors of 
the order of 0.02 magnitudes; the epochs of observation are given in Table\,1}
\renewcommand{\arraystretch}{.95}
\begin{tabular}{|l|c|r|c|c|c|}
\hline
\multicolumn{1}{|c|}{c or ck} & V & \multicolumn{1}{|c|}{U$-$B} & B$-$V & 
V$-$R & V$-$I \\
\hline
\object{HD 1388}    & 6.51 & 0.11 & 0.60 & 0.33 & 0.66 \\
\object{HD 2488}    & 6.87 & 0.05 & 0.53 & 0.29 & 0.59 \\
\object{HD 7220}    & 8.42 & 1.07:& 1.13 & 0.57 & 1.08 \\
\object{HD 7629}    & 7.14 & 0.06:& 0.31 & 0.17 & 0.35 \\
\object{HD 8262}    & 6.96 & 0.12:& 0.64 & 0.34 & 0.68 \\
\object{HD 8405}    & 9.14 & 0.63:& 0.96 & 0.50 & 0.98 \\
\object{HD 8615}    & 8.88 & 0.81:& 1.03 & 0.53 & 1.03 \\
\object{HD 8617}    & 8.97 & 1.02:& 1.13 & 0.58 & 1.11 \\
\object{HD 9520}    & 8.77 & -.07:& 0.46 & 0.27 & 0.56 \\
\object{HD 9896}    & 6.04 & -.03:& 0.39 & 0.22 & 0.45 \\
\object{HD 16371}   & 8.09 & 0.55:& 0.90 & 0.48 & 0.93 \\
\object{HD 16619}   & 7.83 & 0.13:& 0.66 & 0.36 & 0.71 \\
\object{HD 18194}   & 8.33 & 0.25:& 0.73 & 0.40 & 0.78 \\
\object{HD 18618}   & 7.76 & 0.00:& 0.50 & 0.28 & 0.56 \\
\object{HD 20129}   & 9.33 & 0.13:& 0.65 & 0.36 & 0.72 \\
\object{HD 20492}   & 9.61 & 1.02:& 1.07 & 0.63 & 1.17 \\
\object{HD 33747}   & 8.75 & 0.73 & 1.00 & 0.53 & 1.02 \\
\object{HD 33763}   & 8.38 & 0.50 & 0.90 & 0.49 & 0.95 \\
\object{HD 35230}   & 7.58 & 0.48 & 0.88 & 0.48 & 0.93 \\
\object{HD 35322}   & 8.41 & -.02:& 0.42 & 0.26 & 0.51 \\
\object{HD 35995}   & 9.15 & 0.37:& 0.85 & 0.47 & 0.94 \\
\object{HD 36003}   & 7.65 & 1.11:& 1.12 & 0.68 & 1.25 \\
\object{HD 36235}   & 9.44 & 0.01:& 0.51 & 0.30 & 0.62 \\
\object{HD 36313}   & 7.94 & 1.71 & 1.46 & 0.80 & 1.51 \\
\object{HD 40347}   & 6.22 & 1.16:& 1.13 & 0.59 & 1.09 \\
\object{HD 41433}   & 7.05 & 0.67:& 0.95 & 0.50 & 0.95 \\
\object{HD 43306}   & 8.69 & 0.56:& 0.84 & 0.46 & 0.84 \\ 
\object{HD 44007}   & 8.05 & 0.21:& 0.84 & 0.50 & 1.00 \\
\object{HD 44019}   & 7.29 & 1.25:& 1.21 & 0.63 & 1.17 \\
\object{HD 44517}   & 8.04 & 0.04:& 0.54 & 0.32 & 0.64 \\
\object{HD 197237}  & 8.99 & 0.85:& 0.98 & 0.51 & 0.96 \\
\object{HD 197339}  & 7.40 & 1.46:& 1.28 & 0.67 & 1.23 \\
\object{HD 214046}  & 7.55 & 1.77:& 1.43 & 0.76 & 1.48 \\
\object{HD 214380}  & 9.19 & 0.00:& 0.51 & 0.28 & 0.56 \\
\object{SAO 130102} &10.12 & 0.09:& 0.60 & 0.33 & 0.64 \\
\object{SAO 215945} & 9.72 & -.02:& 0.39 & 0.22 & 0.44 \\
\hline
\end{tabular}
\end{table}
\end{document}
