The Tenth Data Release of the Sloan Digital Sky Survey: First
  Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic
  Evolution Experiment
  The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April.
This paper presents the tenth public data release (DR10) from its current
incarnation, SDSS-III. This data release includes the first spectroscopic data
from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along
with spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS)
taken through 2012 July. The APOGEE instrument is a near-infrared R~22,500
300-fiber spectrograph covering 1.514--1.696 microns. The APOGEE survey is
studying the chemical abundances and radial velocities of roughly 100,000 red
giant star candidates in the bulge, bar, disk, and halo of the Milky Way. DR10
includes 178,397 spectra of 57,454 stars, each typically observed three or more
times, from APOGEE. Derived quantities from these spectra (radial velocities,
effective temperatures, surface gravities, and metallicities) are also
included.DR10 also roughly doubles the number of BOSS spectra over those
included in the ninth data release. DR10 includes a total of 1,507,954 BOSS
spectra, comprising 927,844 galaxy spectra; 182,009 quasar spectra; and 159,327
stellar spectra, selected over 6373.2 square degrees.
