Fig. 7
Upper panels: comparison of the profiles of the N V and C IV resonance doublets in the GHRS and STIS spectra of RR Tel taken in 1995 and 2000, respectively. The weak emission line longward the N Vdoublet is C III 1247.3 Å. Its width is similar in both spectra: 0.06 Å in STIS and 0.07 Å in GHRS. Bottom panel: comparison of the STIS profiles of the two N V lines and the 1548 Å C IV line. The grey line shows, for reference, the N V 1238 Å line in the GHRS spectrum. The four spectra shown in this panel have been normalised to the continuum.
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