Stellar population properties for 2 million galaxies from SDSS DR14 and
  DEEP2 DR4 from full spectral fitting
  We determine the stellar population properties - age, metallicity, dust
reddening, stellar mass and the star formation history - for all spectra
classified as galaxies that were published by the Sloan Digital Sky Survey
(SDSS data release 14) and by the DEEP2 (data release 4) galaxy surveys. We
perform full spectral fitting on individual spectra, making use of high
spectral resolution stellar population models. Calculations are carried out for
several choices of the model input, including three stellar initial mass
functions and three input stellar libraries to the models. We study the
accuracy of parameter derivation, in particular the stellar mass, as a function
of the signal-to-noise of the galaxy spectra. We find that at low redshift, a
signal to noise ratio per pixel around 20 (5) allows a statistical accuracy on
$\log_{10}(M^{*}/M_{\odot})$ of 0.2 (0.4) dex, for the Chabrier IMF. For the
first time, we study DEEP2 galaxies selected by their \OII luminosity in the
redshift range $0.83<z<1.03$, finding that they are consistent with a flat
number density in stellar mass in the range $10^9<M/M_{\odot}<10^{11.5}$. We
find the resulting stellar mass function based on SDSS or eBOSS in agreement
with previous studies (Maraston et al. 2013). We publish all catalogs of
properties as well as model spectra of the continuum for these galaxies as a
value added catalog of the fourteenth data release of the SDSS. This catalog is
about twice as large as its predecessors (DR12) and will aid a variety of
studies on galaxy evolution and cosmology.
