160-arcsec radius (taking the AGN as the centre) boundary between inner and outer regions was intended to separate material that could have been been directly influenced by the radio galaxy from material that should still be in its original undisturbed state. The distance of 160 arcsec just beyond the projected length of one lobe. We masked out point sources seen in the [*Chandra*]{} data for these two regions.

Finally, region 3 was a rectangular region just outside the eastern edge of the eastern radio lobe. This rectangle was 111 arcsec in length and 70 arcsec in width. We then took a local circular background region with a 30 arcsec radius. There were no point sources in either region. This region was chosen to allow us to search for any cluster gas that could have been shocked by the radio source. We do not define a corresponding region on the western edge of the source as there is a chip gap on the $pn$ detector that covers the edge of the lobes on that side. For the western lobe we attempted to use a very similar region. However, we were only able to use the MOS cameras for the western lobe 