The 16th Data Release of the Sloan Digital Sky Surveys: First Release from the Apogee-2 Southern Survey and Full Release of Eboss Spectra


Romina Ahumada, Universidad Católica del Norte
Carlos Allende Prieto, Instituto Astrofisico de Canarias
Andrés Almeida, Universidad de La Serena
Friedrich Anders, Leibniz Institute for Astrophysics Potsdam
Scott F. Anderson, University of Washington, Seattle
Brett H. Andrews, University of Pittsburgh
Borja Anguiano, University of Virginia
Riccardo Arcodia, Max Planck Institute for Extraterrestrial Physics
Eric Armengaud, Universite Paris-Saclay
Marie Aubert, Centre de Physique des Particules de Marseille
Santiago Avila, Universidad Autónoma de Madrid
Vladimir Avila-Reese, Universidad Nacional Autónoma de México
Carles Badenes, University of Pittsburgh
Christophe Balland, Sorbonne Universite
Kat Barger, Texas Christian University
Jorge K. Barrera-Ballesteros, Universidad Nacional Autónoma de México
Sarbani Basu, Yale University
Julian Bautista, University of Portsmouth
Rachael L. Beaton, Carnegie Observatories
Timothy C. Beers, University of Notre Dame
B. Izamar T. Benavides, Universidad Nacional Autónoma de México
Chad F. Bender, The University of Arizona
Mariangela Bernardi, University of Pennsylvania
Matthew Bershady, University of Wisconsin-Madison
Florian Beutler, University of Portsmouth
Christian Moni Bidin, Universidad Católica del Norte
Jonathan Bird, Vanderbilt University
Dmitry Bizyaev, Apache Point Observatory
Guillermo A. Blanc, Carnegie Observatories
Michael R. Blanton, The Center for Cosmology and Particle Physics
Mehdi Rezaie, Ohio University
Hee-jong Seo, Ohio University

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© 2020. The Author(s). Published by the American Astronomical Society.. This paper documents the 16th data release (DR16) from the Sloan Digital Sky Surveys (SDSS), the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of data from the Southern Hemisphere survey of the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new data from APOGEE-2 North are also included. DR16 is also notable as the final data release for the main cosmological program of the Extended Baryon Oscillation Spectroscopic Survey (eBOSS), and all raw and reduced spectra from that project are released here. DR16 also includes all the data from the Time Domain Spectroscopic Survey and new data from the SPectroscopic IDentification of ERosita Survey programs, both of which were co-observed on eBOSS plates. DR16 has no new data from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey (or the MaNGA Stellar Library "MaStar"). We also preview future SDSS-V operations (due to start in 2020), and summarize plans for the final SDSS-IV data release (DR17).