The IUE spectra of three optically narrow-line O VI planetary nebulae: NGC1501, IC 1747, and IC 1297

The IUE spectra of NGC 1501, IC 1747, and IC 1297 have been analyzed with t he Final Archive NEWSIPS processing and contain a large amount of new infor mation. The UV spectra of the first two objects have received very little a ttention up to now, although they belong to the astrophysically rare but im portant group of planetary nebulae that exhibit O VI, O VII, and O VIII emi ssion lines. Terminal wind velocities in the range -2500 < V-infinity < -38 80 km s(-1) were derived for the three objects from P Cygni profiles of the O V lambda 1371 and C IV lambda 1549 lines and are thought to be the first detection of stellar winds for these planetaries. Electron densities for I C 1297 have been redetermined, and more than 60 emission lines were identif ied.