Fig. A.1.
Method used to extract the 1D H I spectra is presented in the figures above. (a) presents a galaxy that is unresolved by the WRST beam, and (b) a galaxy that is resolved by the beam. A colour cut-out of the galaxy with the extraction aperture overlaid in green is shown in the top left panel. Bottom left panel: location of the 25 reference spectra relative to the target spectrum. Middle top panel: target spectrum, and the middle bottom panel shows the 25 reference spectra. In both middle panels, the vertical dashed green line indicates the redshift of the target galaxy; the orange band represents the gap between the two frequency bands. (a) Source unresolved by the WRST beam. (b) Source resolved by the WRST beam.
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