Galactic standard of rest to the heliocentric frame is substantially positive ($+161$ [km s$^{-1}$]{}). Even so, only a small fraction of the Galactic halo star distribution presents any possible contamination.

Prior to this work, there were only 77 GCs with published velocities. These were from a series of papers (VHH81, HHH86, HGHH92), the latter of which included 32 velocities from the sample of Sharples (1988). A number of papers (MAGJM96, HCH99, Rejkuba 2001, W.Harris [et al. ]{}2002) subsequently published lists of probable GC candidates in small fields based on imaging data alone. However, it is important to obtain velocities to be more certain of the nature of these objects. Modern fiber spectrographs on southern telescopes, such as the 2-degree Field spectrograph (2dF) on the 3.9-meter Anglo-Australian Telescope, and the Hydra spectrograph on the CTIO Blanco 4-meter telescope, are well-suited to a radial velocity survey in the halo of [NGC 5128]{}.

Observations {#sec:gcobs_spec}
------------

We confirmed GCs and refined our target selection over the course of three spectroscopic observing runs. Our first and third runs were with 2dF. The first was in January 2001 during dark time, and the third was in April 2002 in gray time. The eponymous two degree 