\begin{table}%t1
%\centering
\par
\caption{\label{tablparam}The observed 26 spiral galaxies with some basic parameters.
The Hubble types were taken from the Carnegie Atlas of Galaxies (Sandage \& Bedke \cite{San94}). 
The column $B_{{\rm tot_o}}$ gives the extinction-corrected $B$ magnitudes taken from RC3. 
The inclination $= {\rm arc cos}(b/a)$ stems from the $V$-fit in this paper (cf. $Q_{\rm d} = b/a$ in Table 2).
The galactic extinction $ A_{\rm g}(B)$, the internal extinction $A_{\rm i}(B)$, 
and the radial velocities $v_{\rm 3k}$ with respect to the 3K background were also taken from RC3.
The determination of the distances and their references are explained in the text.
The exposure times for the {\it UBVRI} images are given in seconds. 
NGC 1232 and 1288 were observed with the ESO VLT1 Antu (see text).}
  \begin{tabular}{rrrcrcccrrcrrrrr}
  \hline \hline
 {\rm No}  &{\rm NGC}         &{\rm UGC}   &{\rm Hubble}&$B_{{\rm tot_o}}$ & {\rm Inclin} & {$A_{\rm g}(B)$} & {$A_{\rm i}(B)$} &
{$v_{\rm 3K}$}\quad & {\rm Dist.}&{\rm Dist.} &  &     &{$T_{\exp}$} &   &   \\
           &                  &              &{\rm Type}  &  (mag)  & (deg) & (mag) & (mag) &
(km~s$^{-1}$) & (Mpc)     &       {\rm Ref.}      &{$U$}&{$B$}&{$V$}&{$R$}&{$I$}\\
\hline
        1   &278   &528  &4.0 &10.76  &18.5 &0.78 &0.02   &391 &13.86  &$b\&t$  &900   &480   &300   &180   &180\\
        2   &628  &1149  &5.0  &9.76  &16.6 &0.13 &0.06   &363  &7.80  &$sim$   &1200   &720   &480   &300   &300\\
        3  &1232     &--  &5.0 &10.38  &27.0 &0.04 &0.10  &1519 &20.00  &$tul$    &600   &360   &180   &150   &180\\
        4  &1288     &--  &3.0 &12.62  &35.1 &0.00 &0.11  &4405 &72.11  &$bot$    &--     &360   &180   &--     &180\\
        5  &2196     &--  &2.0 &11.38  &38.1 &0.45 &0.11  &2412 &29.43  &$b\&t$   &900   &480   &300   &150   &150\\
        6  &2460  &4097  &2.0 &12.29  &56.2 &0.14 &0.12  &1532 &26.90  &$b\&t $  &900   &600   &360   &180   &180\\
        7  &2742  &4779  &5.0 &11.47  &60.5 &0.20 &0.44  &1401 &20.29  &$b\&t$  &1200   &900   &600   &480   &300\\
        8  &2775  &4820  &1.0 &10.81  &42.6 &0.11 &0.13  &1650 &17.00  &$tul $   &900   &360   &180    &90    &90\\
        9  &2776  &4838  &5.0 &11.96  &18.7 &0.04 &0.07  &2816 &31.47  &$b\&t$  &1200   &900   &600   &300   &300\\
       10  &2841  &4966  &3.0  &9.58  &67.4 &0.00 &0.50   &807 &14.10  &$hst$    &900   &300    &90    &30    &30\\
       11  &2855     &--  &1.0 &12.29  &37.7 &0.16 &0.04  &2224 &26.30  &$tul$    &900   &480   &300   &180   &180\\
       12  &2997     &--  &5.0  &9.34  &46.4 &0.54 &0.18  &1388 &10.86  &$b\&t$   &900   &480   &360   &180   &240\\
       13  &3031  &5318  &3.0  &7.39  &58.7 &0.16 &0.34    &48  &3.63  &$hst$    &--     &300   &200    &60    &60\\
       14  &3147  &5532  &3.0 &11.24  &34.3 &0.05 &0.08  &2875 &32.34  &$b\&t$   &900   &360   &180    &90    &90\\
       15  &3430  &5982  &4.0 &11.72  &59.0 &0.00 &0.38  &1864 &23.85  &$b\&t$  &1800  &1200   &900   &600   &600\\
       16  &3486  &6079  &4.0 &10.77  &39.5 &0.01 &0.20   &976 &12.30  &$tul$    &900   &480   &300   &180   &180\\
       17  &3521  &6150  &4.0  &9.29  &57.3 &0.06 &0.48  &1162 &10.80  &$b\&t$   &900   &300    &40    &34    &25\\
       18  &3631  &6360  &4.0 &10.97  &10.7 &0.00 &0.04  &1343 &21.60  &$tul$    &900   &600   &480   &300   &300\\
       19  &3938  &6856  &5.0 &10.83  &17.7 &0.00 &0.06  &1036 &17.00  &$tul $  &1200   &900   &600   &300   &300\\
       20  &4254  &7345  &5.0 &10.10  &38.3 &0.11 &0.08  &2732 &15.30  &$vir$    &900   &600   &360   &240   &240\\
       21  &4274  &7377  &1.0 &10.58  &64.8 &0.10 &0.53  &1211 &11.92  &$b\&t$   &900   &480   &300   &180   &180\\
       22  &4303  &7420  &5.0 &10.12  &34.8 &0.00 &0.07  &1909 &15.30  &$vir$    &480   &480   &300   &120   &120\\
       23  &4321  &7450  &5.0  &9.98  &36.5 &0.06 &0.10  &1906 &15.21  &$hst$   &1200   &900   &600   &360   &360\\
       24  &4725  &7989  &3.0  &9.78  &62.7 &0.03 &0.19  &1487 &12.36  &$hst $  &1200   &480   &300   &240   &270\\
       25  &4736  &7996  &2.0  &8.75  &45.0 &0.00 &0.11   &531  &4.46  &$b\&t $  &900   &240   &180    &90    &75\\
       26  &5055  &8334  &4.0  &9.03  &55.7 &0.00 &0.36   &711  &6.94  &$b\&t$   &727   &300   &120    &60    &60\\
   \hline    
   \end{tabular}
\end{table}