This calculator provides the redshift evolution of the luminosities and colors of early-type galaxies for a range of rest-frame filters. In its simplest form it gives the evolution of a single age stellar population formed at a given redshift. However, it can also allow for morphological evolution in the galaxy population ("progenitor bias") and complex star formation histories of individual galaxies.
The calculator is based on the paper given above, with various updates. The most important update is that the powerlaw relations between age and luminosity are now derived from the Bruzual & Charlot (2003) models. Parameters listed in green are identical to those used in the paper. Actually reading the paper may not be required, as the Help links below may contain sufficient information.