The Fourteenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the extended Baryon Oscillation Spectroscopic Survey and from the second phase of the Apache Point Observatory Galactic Evolution Experiment

Understand

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since July 2014.

• This paper describes the second data release from this phase, and the fourteenth from SDSS overall (making this, Data Release Fourteen or DR14).
• This release makes public data taken by SDSS-IV in its first two years of operation (July 2014-2016).
• Like all previous SDSS releases, DR14 is cumulative, including the most recent reductions and calibrations of all data taken by SDSS since the first phase began operations in 2000.