We present the detection of He
II sources in the Im galaxy NGC
1569 from
HST WFPC2 imagery. Out of the fifteen detections,
seven were Wolf-Rayet stars, five were stellar clusters with
associated He
II emission, and three were sources of unknown
origin. The detected Wolf-Rayet stars' colors and magnitudes are
similar to Large Magellanic Cloud late-type WN stars. The physical
origin of the other He
II sources are discussed. We conclude
that the equivalent of 51
19 WNL stars have been detected in NGC
1569, and we have estimated the total Wolf-Rayet population in NGC
1569 as 78
51. These numbers are compared with the Wolf-Rayet
stellar populations in the SMC, LMC, Milky Way, and other starburst
galaxies relative to their luminosities, dynamical masses, and ionized
gas masses.
Previous to this study,
Wolf-Rayet stars in NGC 1569 were not detected using ground-based
imagery, but were only indicated through longslit spectroscopy. This
is the first time the exact locations of the Wolf-Rayet stars
in this nearby, well-studied, ``post-starburst" galaxy have been determined.