Results

The continuum map is shown in Fig. 1 (Right), with components labelled according to Greenfield et al.(1985) and Avruch et al.(1997). The lensing galaxy is associated with radio source, G, seen as a northern extension to component B. There are 28 beams across this background emission at levels > 10 x the rms noise, i.e. we have 28 independent probes of HI absorption per channel.

The HI continuum-subtracted cube was inspected for signs of emission or absorption features. No HI features were detected above 3 x the rms noise per channel. The same conclusion is reached if a continuum map is subtracted from a more restricted range of velocity channels, if the naturally weighted maps are instead examined, or if the continuum-subtracted cube is smoothed over systematically varying velocity or spatial ranges.