\begin{table}%t1
\caption{\label{tab:1}The best-fit parameters obtained from a fit of the column
    density distribution shown in Fig.~\ref{fig:20} using a single
    lognormal distribution, three lognormal distributions, or four
    normal distributions.}
 \small%\centering
\par
  \begin{tabular}{lcccc}
  \hline\hline
    Distr.    & $x_0$    & $x_1$   & $\sigma$& Rel. factor \\
              & (mag)    & (mag)   & (mag)   &             \\
    \hline
        lnGau \#1 & $-0.241$ & $0.503$ & $0.325$ & $1.000$ \\     
   \hline
    lnGau \#1 & $-0.150$ & $0.413$ & $0.501$ & $0.150$ \\
    lnGau \#2 & $-1.805$ & $1.943$ & $0.018$ & $0.744$ \\
    lnGau \#3 & $0.039$  & $0.267$ & $0.371$ & $0.106$ \\ 
    \hline
    Gau \#1   & $0.015$  & --      & $0.022$ & $0.086$ \\
    Gau \#2   & $0.123$  & --      & $0.033$ & $0.353$ \\ 
    Gau \#3   & $0.267$  & --      & $0.064$ & $0.395$ \\
    Gau \#4   & $0.419$  & --      & $0.118$ & $0.166$\\
    \hline
  \end{tabular}
 \end{table}