\begin{table}%t1
\caption{The sample and journal of observations$^{{a}}$.}
\label{sample}
%\centerline
{
\begin{tabular}{lllllrll}
\hline
\hline
Name & $L/H$ & $z$ & $V$ & $M(B)$ & Date & $T$(exp) & {\it FWHM} \\
& & & & & & min & arcsec\\
(1) & (2) & (3) & (4) & (5) & (6) & (7) & (8)\\
\hline
1ES 0120+340   & H & 0.272  & 15.2 & --26.0 & 20/07/2002    & 32 & 0.75\\
MS 0158.5+0019 & H & 0.298  & 18.0 & --23.4 & 17--18/07/2002 & 44 & 0.85\\
MS 0205.7+3509 & H & 0.318: & 19.2 & --22.3 & 20/07/2002    & 48 & 0.65\\
MS 0317.0+1834 & H & 0.190  & 18.1 & --22.2 & 18/07/2002    & 32 & 0.80\\
Mrk 180        & H & 0.045  & 14.5 & --22.1 & 17/07/2002    & 20 & 0.60\\
1ES 1218+304   & H & 0.182  & 16.5 & --23.0 & 18/07/2002    & 32 & 0.70\\
MS 1221.8+2452 & H & 0.218: & 17.4 & --22.7 & 19/07/2002    & 32 & 0.85\\
MS 1229.2+6430 & H & 0.164  & 16.9 & --23.1 & 17/07/2002    & 40 & 0.60\\
1ES 1255+244   & H & 0.140  & 15.4 & --24.3 & 20/07/2002    & 27 & 0.70\\
1ES 1426+428   & H & 0.129  & 16.5 & --22.5 & 17/07/2002    & 30 & 0.70\\
1ES 1440+122   & H & 0.162  & 17.1 & --22.9 & 18/07/2002    & 32 & 0.90\\
MS 1458.8+2249 & H & 0.235  & 16.8 & --24.0 & 20/07/2002    & 32 & 0.60\\
MS 1552.1+2020 & H & 0.273  & 17.7 & --23.0 & 18/07/2002    & 40 & 0.80\\
Mrk 501        & H & 0.034  & 13.8 & --22.4 & 17/07/2002    & 10 & 0.70\\
I Zw 187       & H & 0.055  & 16.0 & --21.1 & 17/07/2002    & 30 & 0.60\\
3C 371         & L & 0.051  & 14.2 & --22.7 & 18/07/2002    & 23 & 0.75\\
1ES 1853+671   & H & 0.212  & 16.4 & --24.2 & 17/07/2002    & 30 & 0.85\\
1ES 1959+650   & H & 0.048: & 12.8 & --24.5 & 20/07/2002    & 16 & 0.55\\
BL Lac         & L & 0.069  & 14.7 & --22.4 & 17/07/2002    & 28 & 0.65\\
PKS 2201+04    & L & 0.027  & 15.2 &       & 19/07/2002    & 32 & 0.65\\
PKS 2254+074   & L & 0.194  & 16.4 & --23.3 & 19/07/2002    & 32 & 0.70\\
1ES 2326+174   & H & 0.213  & 16.8 & --23.8 & 17/07/2002    & 40 & 0.70\\
1ES 2344+514   & H & 0.044  & 15.5 & --21.6 & 18/07/2002    & 24 & 0.75\\
\hline
\end{tabular}}
\medskip
$^{{a}}$ Column (1) gives the name of the object; (2) high-frequency (H) or 
low-frequency (L) peaked object; (3) the redshift; 
(4) $V$-band apparent magnitude; (5) $B$-band absolute magnitude; 
(6) the date of observation; (7) total exposure time; and (8) seeing {\it FWHM}.
\end{table}