John C. Wilson

TL;DR: The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using the original SDSS wide-field imager, the original and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution spectrogram, and a novel optical interferometer as discussed by the authors.

TL;DR: In this paper, the Sloan Digital Sky Survey III (SDSS-III) presented the first spectroscopic data from the Baryon Oscillation Spectroscopic Survey (BOSS), along with the data presented in previous data releases.

TL;DR: SDSS-III as discussed by the authors contains the first spectroscopic data from the Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) taken through 2012 July.

TL;DR: The Apache Point Observatory Galactic Evolution Experiment (APOGEE) as discussed by the authors collected a half million high resolution (R~22,500), high S/N (>100), infrared (1.51-1.70 microns) spectra for 146,000 stars, with time series information via repeat visits to most of these stars.

TL;DR: ASPCAP as discussed by the authors is a system developed by the Apache Point Observatory Galactic Evolution Experiment (APOGEE) to determine atmospheric parameters and chemical abundances from observed spectra using chi-2 minimization in a multidimensional parameter space.