If you wish to acknowledge Katana in a publication then please use the following text.
This research includes computations using the Linux computational cluster Katana supported by the Faculty of Science, UNSW Australia.
If you are using nodes that have been purchased using an external funding source you should also acknowledge the source of those funds.
For information about acknowledging ARC funding see http://www.arc.gov.au/about_arc/acknowledgementform.htm
Facilities external to UNSW
If you are using facilities at Intersect and NCI in addition to Katana they may also require some form of acknowledgement: