...``NEWSIPS"

NEW Spectral Imaging Processing System (see Garhart et al. 1997).

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...MAST.

Multi-Mission Archive at the Space Telescope Science Institute, funded through a NASA contract to the STScI.

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...IUEDAC

IUE Data Analysis Center (IUEDAC) was a group in the IUE Project dedicated to writing specialized IDL software for the analysis of IUE spectra.

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...IRAF

``IRAF" is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.

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...echellogram.

The reference echellograms used in this step were SWP 38001, LWP 15422, and LWR 18381.

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...RR Tel,

The UV spectrum of RR Tel, a symbiotic binary, is dominated by several strong emission lines. The cross-correlation results we report are for those orders containing these emission lines. Since these orders contain only 1-2 strong lines apiece the r.m.s. errors are large, ± 6.5 km s^-1. Other orders in these spectra contain faint absorption lines, which produce an r.m.s. in their shifts of nearly the same value, ± 7.1 km s^-1. The orders containing emission lines give comparable quality cross-correlation results as those without them. RR Tel shows by far the poorest cross-correlations of any spectra in our sample.

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...values.

The full table of measured and laboratory wavelengths used by Brandt et al. is available at the URL http://archive.stsci.edu/hst/atlas10lac/datalist.html .

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...wavelengths.

The line list for SWP camera data was culled to 288 lines from the Reader et al. (1990) list. This is about twice the number of lines used for the IUESIPS calibration. The line list for high-dispersion LWP/LWR data contains 479 lines.

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