EAZY is a photometric redshift code designed to produce high-quality redshifts over 0<z<4 for situations where complete spectroscopic calibration samples are not available. Details of the algorithm and tests of the code on public multi-wavelength photometric datasets are presented by Brammer, van Dokkum & Coppi (2008)[ADS][PDF].

EAZY is freely distributed to the astronomical community. Instructions on how to download and install the code are available on the Download page, and a user's manual describing how to set up the code for your own dataset is available on the Documentation page.

If you find this code useful, please include a citation to "Brammer, van Dokkum & Coppi, 2008, ApJ, 686, 1503" in the bibliography of any published work that makes use of EAZY.

- Gabriel Brammer, Pieter van Dokkum, Paolo Coppi (New Haven, July 2008)

<< UPDATE (September 2012) >>

The most up-to-date version of the code is now hosted in an SVN repository available here: http://code.google.com/p/eazy-photoz/. Along with numerous bug fixes, the latest version of the code provides estimates of rest-frame color indices, such as those used by Brammer et al. (2011) and other papers from the NMBS project. A new template set with improved treatment of emission lines and a filter file with many additional (e.g. HST) filters is also provided.