A Gaia DR2 Mock Stellar Catalog

Understand

We present a mock catalog of Milky Way stars, matching in volume and depth the content of the Gaia data release 2 (GDR2).

• We generated our catalog using Galaxia, a tool to sample stars from a Besancon Galactic model, together with a realistic 3D dust extinction map.
• The catalog mimicks the complete GDR2 data model and contains most of the entries in the Gaia source catalog: 5-parameter astrometry, 3-band photometry, radial velocities, stellar parameters, and associated scaled nominal uncertainty estimates.
• In addition, we supplemented the catalog with extinctions and photometry for non-Gaia bands.