| We will be working with real data: The galaxy spectra were obtained by Robert C. Kennicutt Jr. of the University of Arizona, and are published in The Astrophysical Journal Supplement Series, volume 79, pages 255-284, 1992, and are also available on the WWW. The digital images of the galaxies have been extracted from the CD-ROM version of the Palomar Observatory Sky Survey, which was produced under NASA contract by the Space Telescope Science Institute, operated by AURA, Inc. We gratefully acknowledge the various copyrights for that work. |