SIMBAD references

Broad stellar emission lines have been detected in the optical spectrum of a small cluster in the post-starburst galaxy NGC 1569. These lines, He I 5876, H-alpha, and He I 6678, have a full width at half maximum of 600 km s^-1, and are attributed to a late-type WN star. the cluster, located in the outskirts of the galaxy, is surrounded by a large (Radius = 30 pc) ring nebula. This detection of a Wolf-Rayet star is a direct evidence of recent (≤ 5 Myrs) massive (M_i ≥ 40 solar mass) star formation in NGC 1569.