\begin{table}%t1
%tab.1
%\centering
\par
\caption{Average of linear fits to histogram equating curves for 22 days between November 28, 1992 and April 10, 1993 based on NSO-512 and NSO-SPM magnetograms.}
\label{tab:1}
$$
\begin{tabular}{r@{ vs. }lr@{ $\pm$ }lr@{ $\pm$ }l}
\hline
\hline
\multicolumn{2}{c}{Comparison} & \multicolumn{2}{c}{Intercept} & \multicolumn{2}{c}{Slope} \\
\hline
NSO-512 & NSO-SPM   & 0.201 & 0.031 & 1.514 & 0.001 \\
NSO-512/1.63 & NSO-SPM  & 0.191 & 0.020 & 1.004 & 0.001 \\
\hline
\end{tabular}
$$
\end{table}