This page provides access to auxiliary data files needed to run my new 2017 (beta) version of the Wilson-Devinney (WD17) binary star program. WD17 can access atmosphere and limb darkening data based on two sets of atmosphere models: Kurucz (Teff between 3,500 and 50,000 K, log g between 0.0 and 5.0) and Phoenix (Teff between 2,300 and 12,000 K, log g between 0.0 and 6.0). The previous version Kurucz-based limb darkening (limco_bp_*.dat) and atmcof.dat files have not changed. The atmcofplanck.dat and effwvl.dat files also remain unchanged. The LC and DC programs require access to the Phoenix-based files atmcof_phoenix.dat,  limcof_bp_*.dat, and corresponding *preamble* files. All new data files are in the gzipped tar file linked below.