Acknowledgment for DiFX

VLBA observations are currently correlated using NRAO's implementation of the DiFX software correlator.  DiFX was developed at Swinburne University in Melbourne, Australia, and is used by NRAO under license from Swinburne.  We encourage users to include the following text in the Acknowledgments section of any publication arising from VLBA observations made since December 2009:

This work made use of the Swinburne University of Technology software correlator, developed as part of the Australian Major National Research Facilities Programme and operated under licence.

... and to cite the following recent paper by the developers: Deller, et al. 2011, PASP, 123, 275.

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