Fig. 4
Comparison of the redshifts derived from the various observations. The horizontal lines represent the original (dotted; from Holt et al. 2008) and new (solid; this paper) interpretations of the systemic velocity. The vertical dot-dashed line labelled “shallow” marks the range of velocities over which the shallow H I absorption is observed (Morganti et al. 2001). The data are also summarised in Table 1.
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