Abstract
ABSTRACTWe present the first detection of O vii λ1522 emission or absorption from archival IUE spectra in 14 planetary nebula nuclei and three PG 1159–type stars. The n = 5→6 transition of O vii was determined by Kruk & Werner and observed by them in the spectrum of the very hot PG 1159–type star H1504+65 from data obtained with the Hopkins Ultraviolet Telescope (HUT). Emission‐line fluxes or absorption equivalent widths as well as radial velocities for the program stars are presented. The precise rest wavelength for the 5→6 transition requires further investigation.
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