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
Authors: Abolfathi Bela , Aguado D. S. , Aguilar Gabriela , Prieto Carlos Allende , Almeida Andres , Ananna Tonima Tasnim , Anders Friedrich , Anderson Scott F. , Andrews Brett H. , Anguiano Borja , Aragón-Salamanca Alfonso , Argudo-Fernández Maria , Armengaud Eric , Ata Metin , Aubourg Eric , Avila-Reese Vladimir , Badenes Carles , Bailey Stephen , Balland Christophe , Barger Kathleen A. , Barrera-Ballesteros Jorge , Bartosz Curtis , Bastien Fabienne , Bates Dominic , Baumgarten Falk , Bautista Julian , Beaton Rachael , Beers Timothy C. , Belfiore Francesco , Bender Chad F. , Bernardi Mariangela , Bershady Matthew A. , Beutler Florian , Bird Jonathan C. , Bizyaev Dmitry , Blanc Guillermo A. , Blanton Michael R. , Blomqvist Michael , Bolton Adam S. , Boquien Médéric , Borissova Jura , Bovy Jo , Bradna Diaz Christian Andres , Nielsen Brandt William , Brinkmann Jonathan , Brownstein Joel R. , Bundy Kevin , Burgasser Adam J. , Burtin Etienne , Busca Nicolás G. , Cañas Caleb I. , Cano-Díaz Mariana , Cappellari Michele , Carrera Ricardo , Casey Andrew R. , Sodi Bernardo Cervantes , Chen Yanping , Cherinka Brian , Chiappini Cristina , Choi Peter Doohyun , Chojnowski Drew , Chuang Chia-Hsun , Chung Haeun , Clerc Nicolas , Cohen Roger E. , Comerford Julia M. , Comparat Johan , do Nascimento Janaina Correa , da Costa Luiz , Cousinou Marie-Claude , Covey Kevin , Crane Jeffrey D. , Cruz-Gonzalez Irene , Cunha Katia , Ilha Gabriele da Silva , Damke Guillermo J. , Darling Jeremy , Davidson James W. , Dawson Kyle , de Icaza Lizaola Miguel Angel C. , Macorra Axel de la , de la Torre Sylvain , De Lee Nathan , Sainte Agathe Victoria de , Deconto Machado Alice , Dell’Agli Flavia , Delubac Timothée , Diamond-Stanic Aleksandar M. , Donor John , Downes Juan José , Drory Niv , Mas des Bourboux Hélion du , Duckworth Christopher J. , Dwelly Tom , Dyer Jamie , Ebelke Garrett , Eigenbrot Arthur Davis , Eisenstein Daniel J. , Elsworth Yvonne P. , Emsellem Eric , Eracleous Michael , Erfanianfar Ghazaleh , Escoffier Stephanie , Fan Xiaohui , Alvar Emma Fernández , Fernandez-Trincado J. G. , Cirolini Rafael Fernando , Feuillet Diane , Finoguenov Alexis , Fleming Scott W. , Font-Ribera Andreu , Freischlad Gordon , Frinchaboy Peter , Fu Hai , Chew Yilen Gómez Maqueo , Galbany Lluís , García Pérez Ana E. , Garcia-Dias R. , García-Hernández D. A. , Garma Oehmichen Luis Alberto , Gaulme Patrick , Gelfand Joseph , Gil-Marín Héctor , Gillespie Bruce A. , Goddard Daniel , González Hernández Jonay I. , Gonzalez-Perez Violeta , Grabowski Kathleen , Green Paul J. , Grier Catherine J. , Gueguen Alain , Guo Hong , Guy Julien , Hagen Alex , Hall Patrick , Harding Paul , Hasselquist Sten , Hawley Suzanne , Hayes Christian R. , Hearty Fred , Hekker Saskia , Hernandez Jesus , Hernandez Toledo Hector , Hogg David W. , Holley-Bockelmann Kelly , Holtzman Jon A. , Hou Jiamin , Hsieh Bau-Ching , Hunt Jason A. S. , Hutchinson Timothy A. , Hwang Ho Seong , Jimenez Angel Camilo Eduardo , Johnson Jennifer A. , Jones Amy , Jönsson Henrik , Jullo Eric , Sakil Khan Fahim , Kinemuchi Karen , Kirkby David , Kirkpatrick IV Charles C. , Kitaura Francisco-Shu , Knapp Gillian R. , Kneib Jean-Paul , Kollmeier Juna A. , Lacerna Ivan , Lane Richard R. , Lang Dustin , Law David R. , Le Goff Jean-Marc , Lee Young-Bae , Li Hongyu , Li Cheng , Lian Jianhui , Liang Yu , Lima Marcos , Lin 林俐 Lihwai 暉 , Long Dan , Lucatello Sara , Lundgren Britt , Mackereth J. Ted , MacLeod Chelsea L. , Mahadevan Suvrath , Geimba Maia Marcio Antonio , Majewski Steven , Manchado Arturo , Maraston Claudia , Mariappan Vivek , Marques-Chaves Rui , Masseron Thomas , Masters 何凱 Karen L. 論 , McDermid Richard M. , McGreer Ian D. , Melendez Matthew , Meneses-Goytia Sofia , Merloni Andrea , Merrifield Michael R. , Meszaros Szabolcs , Meza Andres , Minchev Ivan , Minniti Dante , Mueller Eva-Maria , Muller-Sanchez Francisco , Muna Demitri , Muñoz Ricardo R. , Myers Adam D. , Nair Preethi , Nandra Kirpal , Ness Melissa , Newman Jeffrey A. , Nichol Robert C. , Nidever David L. , Nitschelm Christian , Noterdaeme Pasquier , O’Connell Julia , Oelkers Ryan James , Oravetz Audrey , Oravetz Daniel , Ortíz Erik Aquino , Osorio Yeisson , Pace Zach , Padilla Nelson , Palanque-Delabrouille Nathalie , Palicio Pedro Alonso , Pan Hsi-An , Pan Kaike , Parikh Taniya , Pâris Isabelle , Park Changbom , Peirani Sebastien , Pellejero-Ibanez Marcos , Penny Samantha , Percival Will J. , Perez-Fournon Ismael , Petitjean Patrick , Pieri Matthew M. , Pinsonneault Marc , Pisani Alice , Prada Francisco , Prakash Abhishek , de Andrade Queiroz Anna Bárbara , Raddick M. Jordan , Raichoor Anand , Rembold Sandro Barboza , Richstein Hannah , Riffel Rogemar A. , Riffel Rogério , Rix Hans-Walter , Robin Annie C. , Torres Sergio Rodríguez , Román-Zúñiga Carlos , Ross Ashley J. , Rossi Graziano , Ruan John , Ruggeri Rossana , Ruiz Jose , Salvato Mara , Sánchez Ariel G. , Sánchez Sebastián F. , Almeida Jorge Sanchez , Sánchez-Gallego José R. , Rojas Felipe Antonio Santana , Santiago Basílio Xavier , Schiavon Ricardo P. , Schimoia Jaderson S. , Schlafly Edward , Schlegel David , Schneider Donald P. , Schuster William J. , Schwope Axel , Seo Hee-Jong , Serenelli Aldo , Shen Shiyin , Shen Yue , Shetrone Matthew , Shull Michael , Aguirre Víctor Silva , Simon Joshua D. , Skrutskie Mike , Slosar Anže , Smethurst Rebecca , Smith Verne , Sobeck Jennifer , Somers Garrett , Souter Barbara J. , Souto Diogo , Spindler Ashley , Stark David V. , Stassun Keivan , Steinmetz Matthias , Stello Dennis , Storchi-Bergmann Thaisa , Streblyanska Alina , Stringfellow Guy S. , Suárez Genaro , Sun Jing , Szigeti Laszlo , Taghizadeh-Popp Manuchehr , Talbot Michael S. , Tang Baitian , Tao Charling , Tayar Jamie , Tembe Mita , Teske Johanna , Thakar Aniruddha R. , Thomas Daniel , Tissera Patricia , Tojeiro Rita , Tremonti Christy , Troup Nicholas W. , Urry Meg , Valenzuela O. , Bosch Remco van den , Vargas-González Jaime , Vargas-Magaña Mariana , Vazquez Jose Alberto , Villanova Sandro , Vogt Nicole , Wake David , Wang Yuting , Weaver Benjamin Alan , Weijmans Anne-Marie , Weinberg David H. , Westfall Kyle B. , Whelan David G. , Wilcots Eric , Wild Vivienne , Williams Rob A. , Wilson John , Wood-Vasey W. M. , Wylezalek Dominika , Xiao 肖 Ting 婷 , Yan Renbin , Yang Meng , Ybarra Jason E. , Yèche Christophe , Zakamska Nadia , Zamora Olga , Zarrouk Pauline , Zasowski Gail , Zhang Kai , Zhao Cheng , Zhao Gong-Bo , Zheng Zheng , Zheng Zheng , Zhou Zhi-Min , Zhu Guangtun , Zinn Joel C. , Zou Hu 
Published: April 2018

Abstract
The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes the second data release from this phase, and the 14th from SDSS overall (making this Data Release Fourteen or DR14). This release makes the data taken by SDSS-IV in its first two years of operation (2014–2016 July) public. 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. New in DR14 is the first public release of data from the extended Baryon Oscillation Spectroscopic Survey; the first data from the second phase of the Apache Point Observatory (APO) Galactic Evolution Experiment (APOGEE-2), including stellar parameter estimates from an innovative data-driven machine-learning algorithm known as “The Cannon”; and almost twice as many data cubes from the Mapping Nearby Galaxies at APO (MaNGA) survey as were in the previous release (N = 2812 in total). This paper describes the location and format of the publicly available data from the SDSS-IV surveys. We provide references to the important technical papers describing how these data have been taken (both targeting and observation details) and processed for scientific use. The SDSS web site (www.sdss.org) has been updated for this release and provides links to data downloads, as well as tutorials and examples of data use. SDSS-IV is planning to continue to collect astronomical data until 2020 and will be followed by SDSS-V.