摘要：The data and analysis methodology used for the SDSS/APOGEE Data Releases 13 and 14 are described,highlighting differences from the DR12 analysis presented in Holtzman et al. Some improvement in the handlingof telluric absorption and persistence is demonstrated. The derivation and calibration of stellar parameters,chemical abundances, and respective uncertainties are described, along with the ranges over which calibration wasperformed. Some known issues with the public data related to the calibration of the effective temperatures (DR13),surface gravity (DR13 and DR14), and C and N abundances for dwarfs (DR13 and DR14) are highlighted. Wediscuss how results from a data-driven technique, The Cannon, are included in DR14 and compare those withresults from the APOGEE Stellar Parameters and Chemical Abundances Pipeline. We describe how using TheCannon in a mode that restricts the abundance analysis of each element to regions of the spectrum with knownfeatures from that element leads to Cannon abundances can lead to significantly different results for some elementsthan when all regions of the spectrum are used to derive abundances.
关键词：methods: data analysis;stars: abundances;techniques: spectroscopic
