\begin{table}%t3
\caption{Gaussian decomposition of prominent emission lines.}
%\centerline
 {\small \begin{tabular}{lrrrrrr}
 \hline \hline
\hspace*{4ex} Date & \multicolumn{3}{c}{March 20} & \multicolumn{3}{c}{April 8} \\
\hspace*{4ex} JD & \multicolumn{3}{c}{3814.7} & \multicolumn{3}{c}{3833.6} \\
  & r.v.  & $fwhm$  & flux & r.v. & fwhm & flux  \\
\hline
 \multicolumn{2}{c}{H$\beta$} & & &  & &    \\
 central & +6 & 133  & 12  & +26  & 96 & 17  \\
 blue & --156 &  228 & 15 & --89  & 243  & 25 \\
  red & +198 & 298  & 23 & +170  & 186 & 15 \\
 broad & +35 & 1109 & 50 & +34  & 1060 & 43 \\
  \multicolumn{2}{c}{He~I~5876} & & &  &  &  \\
 central  & --38 & 74 & 6 & --21 & 68 & 19 \\
 blue & --185 & 264 & 22 & --154  & 245 & 33 \\
 red & +166 & 264 & 15 & +133  & 145 & 9 \\
 broad & --27 & 1376 & 57 & --19 & 1129 & 39 \\
  \multicolumn{2}{c}{He~II~4686} & & &  &  &  \\
 central  & +27 & 72 & 17 & +38 & 57 & 30 \\
 blue & --133 & 228 & 13 & --135  & 171 & 14 \\
 red & +244 & 269 & 8 & +213  & 101 & 2 \\
 broad & +1 & 906 & 62 & +40 & 784 & 54 \\
\hline
 \end{tabular}}
\medskip
JD: Julian date + 2450000; r.v.: Heliocentric radial velocity in~\km~ of line center; $fwhm$: Full width at half maximum; flux: Fraction of flux in \%. 
\end{table}