Preliminary Target Selection for the DESI Luminous Red Galaxy (LRG)
  Sample
  The DESI survey will observe more than 8 million candidate luminous red
galaxies (LRGs) in the redshift range $0.3<z<1.0$. Here we present a
preliminary version of the DESI LRG target selection developed using Legacy
Surveys Data Release 8 $g$, $r$, $z$ and $W1$ photometry. This selection yields
a sample with a uniform surface density of ${\sim}\,600$ deg$^{-2}$and very low
predicted stellar contamination and redshift failure rates. During DESI Survey
Validation, updated versions of this selection will be tested and optimized.
