\begin{table}%t3
%\centering
\par
\caption {Barycentric timings of the spin maxima (spin phase zero),
the eclipse center, and the zero crossing of the absorption lines from
the secondary star (orbital phase zero). The O--C~values are
given relative to the ephemerides of \citet{helliersproats92} (see
text).
%
\label{tab:timings}}
\begin{tabular}{l@{\hspace{7mm}}c@{\hspace{7mm}}c@{\hspace{7mm}}c} 
\hline \hline \noalign{\smallskip}
Band & HJD+2400000 & Error & O--C \\
     &    (d)      &   (d) &  (d)     \\[0.5ex]
\noalign{\smallskip} \hline
\noalign{\medskip}
\multicolumn{2}{l}{{(a) Spin maxima}} \\[0.5ex]
Blue light & 53027.7670 & 0.0014 & 0.0113  \\
               & 53027.8109 & 0.0014 & 0.0087  \\
               & 53030.8381 & 0.0014 & 0.0104  \\
\hbeta\ flux   & 53027.7640 & 0.0014 & 0.0083  \\
               & 53027.8109 & 0.0014 & 0.0087  \\
               & 53030.8360 & 0.0014 & 0.0083  \\[0.5ex]
\multicolumn{2}{l}{{(b) Eclipse timing}} \\[0.5ex]
Blue light, \hbeta\ flux   & 53030.7909 & 0.0014 & \hspace{-1.8mm}$-0.0004$  \\[0.5ex]
\multicolumn{2}{l}{{(c) Absorption line zero crossing}} \\[0.5ex]
NaI doublet    & 53030.7893 & 0.0001 & \hspace{-1.8mm}$-0.0012$  \\			         
\noalign{\smallskip} \hline      
\end{tabular}
\end{table}