\begin{table}%t1
\caption{\label{tab:obs}Parameters of the GMRT observations.}
%\centering
\par
\begin{tabular}{ll}
\hline\hline
Parameters& Value \\
\hline
RA(2000) & $\rm 20^h46^m53.0^s$\\
Declination(2000) &  $-{12}^{\circ} 50' 57''$\\
Central velocity (heliocentric) & $-$139.0~km~s$^{-1}$\\
Date of observations & 13$-$15 July 2002\\
Time on source & 16 hrs\\
Total bandwidth & 1.0 MHz\\
Number of channels & 128\\
Channel separation & 1.65~km~s$^{-1}$\\
{\it FWHM} of synthesized beam  & 44$''\times37''$, 29$''\times23''$,\\ 
                          & 20$''\times15''$, 12$''\times11''$ \\
RMS noise per channel & 2.2~mJy, 1.8 mJy, 1.6 mJy\\ 
                           &1.4 mJy\\
\hline
\end{tabular}
\end{table}