Detection of O VII lambda 1522 in IUE spectra of planetary nebula nuclei and other hot stars

We present the first detection of O VII lambda 1522 emission or absorption from archival IUE spectra in 14 planetary nebula nuclei and three PG 1159-t ype stars. The n = 5 --> 6 transition of O VII was determined by Kruk & Wer ner 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). E mission-line fluxes or absorption equivalent widths as well as radial veloc ities for the program stars are presented. The precise rest wavelength for the 5 --> 6 transition requires further investigation.