The ultraviolet spectrum of the Seyfert galaxy NGC 4151

Spectra at 1.3 A resolution of the spectral region lambda lambda 3100 to 4000 have been obtained. Identifications and equivalent widths of emission lines are presented. The He I lambda 3889 absorption varied by a factor 3.5 in 37 days and He I lambda 3188 absorption was seen when lambda 3889 was strong. The [N I] line ratio lambda 5199 to 3466 is consistent with nsub(e) approximately 104 cm-2 in the region emitting the forbidden lines. Several short-wavelength lines are identified including the He II lambda 3203 and several lines of [Fe V] multiplet 3F. (author)