sci-astronomy The Zurich Extragalactic Bayesian Redshift Analyzer is a software to compute and analyze photometric redshifts of galaxies. ZEBRA combines and extends several of the classical approaches to produce accurate photometric redshifts down to faint magnitudes. In particular, ZEBRA uses the template-fitting approach to produce Maximum Likelihood and Bayesian redshift estimates based on: * An automatic iterative technique to correct the original set of galaxy templates to best represent the SEDs of real galaxies at different redshifts; * A training set of spectroscopic redshifts for a small fraction of the photometric sample, to improve the robustness of the photometric redshift estimates; and * An iterative technique for Bayesian redshift estimates, which extracts the full two-dimensional redshift and template likelihood function for each galaxy.