Low-Mass Dwarf Template Spectra from the Sloan Digital Sky Survey
  We present template spectra of low-mass (M0-L0) dwarfs derived from over 4,000 Sloan Digital Sky Survey (SDSS) spectra. These composite spectra are suitable for use as medium-resolution (R ~ 1,800) radial velocity standards. We report mean spectral properties (molecular bandhead strengths,equivalent widths) and use the templates to investigate the effects of magnetic activity and metallicity on the spectroscopic and photometric properties of low-mass stars. 
John J. Bochanski, Andrew A. West, Suzanne L. Hawley & Kevin R. Covey