\begin{table}%tC.1
\caption{\label{phaseshifts}Maximum possible phase shifts$^a$.}
\small%\centerline
 {
\begin{tabular}{ccc}
\hline\hline
&& \\[-8pt]
Date UT$^b$ & \multicolumn{2}{c}{Confidence level} \\
\cline{2-3}
 (May 2006)&   75\%  & 95\%   \\ 
\hline
11.6885   &   0.004 & 0.009  \\
12.5524   &   0.008 & 0.016  \\
20.6222   &   0.040 & 0.083  \\
22.4882   &   0.047 & 0.100  \\
\hline
\end{tabular}}
\medskip
$^a$ Calculated with respect to the mid-point of the first observing run, May~10.4979, 2006~UT. The
statistics were constrained from over 1~\mbox{million} spin axis orientations distributed uniformly in~space. 
$^b$ Middle moment of an individual observing run.
\vspace*{3mm}
\end{table}