\begin{table}%t3
%\centering
\par
\caption{Diffractive decorrelation bandwidth and coherence
time of pulsars B0329+54, B0823+26, B0950+08, B1133+16 and
B1937+21.\label{tab:ScintDec}} 
\begin{tabular}{lccccc}
\hline\hline
Pulsar & Frequency & Time resolution & $\Delta \nu_{\rm dc}$ & $1/\Delta \nu_{\rm dc}$ & Measured
coherence \\
  & (MHz) & (ns) &       & ($\mu$s) & time ($\mu$s)\\
\hline
B0329+54 & 328 & 100 & 29~kHz~[1] &34 &35 [4]\\
B0823+26 & 430 & 100 & $0.81$~MHz~[1] & 1.2 & 1.5 [5] \\ 
B0950+08 & 382 & 50  & $0.22 \pm 0.03$~GHz~[3] &4.5$\times10^{-3}$ & none [4]\\
B0950+08 & 430 & 100 & $0.35 \pm 0.05$~GHz~[3]  & 2.9$\times10^{-3}$ & 0.4 [5] \\
B1133+16 & 430 & 100 & $1.47$~MHz~[1] & 0.67 & 1.1 [5]  \\
B1937+21 & 430 & 100 & 4.2 $\pm$ 0.9 kHz~[2]    & 238 & none [5] \\
\hline
\end{tabular} 
\begin{flushleft}
\begin{tabular}{rl}
  \footnotesize
      \hspace*{2cm} [1] & \citet{Cordes86}. \\{}
      \hspace*{2cm} [2] & \citet{Cordes90}. \\{}
      \hspace*{2cm} [3] & {\citet{Phillips92}. }\\{}
      \hspace*{2cm} [4] & Our data. \\{}
      \hspace*{2cm} [5] & Data from JAP. \\
      \end{tabular}
\end{flushleft}
\end{table}