\begin{table}%t2
%\centering
\par
\caption{Millimetre observations of the  GRB~021004 afterglow 
at PdB. \label{mmtab} }{
\begin{tabular}{c c c c}
\noalign{\smallskip} \hline
\hline \noalign{\smallskip}
Date 2002  & Frequency  & Flux  & Flux error \\
  (UT)     &   (GHz)    & (mJy) &   (mJy)    \\
\noalign{\smallskip} \hline \noalign{\smallskip}
Oct. 5.9844 &   86.293   & 2.47  &    0.29    \\
Oct. 5.9844 &  231.700   & 1.22  &    1.22    \\
Oct. 6.1458 &  115.261   & 1.62  &    1.44    \\
Oct. 6.1458 &  231.700   & 0.22  &    3.65    \\
Oct. 7.1438 &   87.717   & 2.57  &    0.56    \\
Oct. 7.1438 &  232.034   & 3.26  &    1.54    \\
Oct. 10.981 &   86.235   & 1.67  &    0.34    \\
Oct. 10.981 &  208.475   & 4.71  &    1.96    \\
Oct. 19.919 &   92.016   & 0.97  &    0.25    \\
Oct. 19.919 &  231.972   & 1.60  &    1.00    \\
Nov. 5.9813 &   97.991   & 0.15  &    0.27    \\
Nov. 5.9813 &  239.551   &-0.33  &    0.71    \\
 \hline \end{tabular}
} 
\end{table}