Draft version September 26, 2017Preprint typeset using LATEX style emulateapj v. 01/23/15

THE THIRTEENTH DATA RELEASE OF THE SLOAN DIGITAL SKY SURVEY: FIRST SPECTROSCOPICDATA FROM THE SDSS-IV SURVEY MAPPING NEARBY GALAXIES AT APACHE POINT OBSERVATORY

Franco D. Albareti1,2,3, Carlos Allende Prieto4,5, Andres Almeida6, Friedrich Anders7, Scott Anderson8,Brett H. Andrews9, Alfonso Aragon-Salamanca10, Maria Argudo-Fernandez11,12, Eric Armengaud13,

Eric Aubourg14, Vladimir Avila-Reese15, Carles Badenes9, Stephen Bailey16, Beatriz Barbuy17,18,Kat Barger19, Jorge Barrera-Ballesteros20, Curtis Bartosz8, Sarbani Basu21, Dominic Bates22,

Giuseppina Battaglia4,5, Falk Baumgarten7,23, Julien Baur13, Julian Bautista24, Timothy C. Beers25,Francesco Belfiore26,27, Matthew Bershady28, Sara Bertran de Lis4,5, Jonathan C. Bird29,

Dmitry Bizyaev30,31,32, Guillermo A. Blanc33,34,35, Michael Blanton36, Michael Blomqvist37, Adam S. Bolton38,24,J. Borissova39,40, Jo Bovy41,42, William Nielsen Brandt43,44,45, Jonathan Brinkmann30, Joel R. Brownstein24,Kevin Bundy46, Etienne Burtin13, Nicolas G. Busca14, Hugo Orlando Camacho Chavez47,18, M. Cano Daz15,

Michele Cappellari48, Ricardo Carrera4,5, Yanping Chen49, Brian Cherinka20, Edmond Cheung46,Cristina Chiappini7, Drew Chojnowski31, Chia-Hsun Chuang7, Haeun Chung50, Rafael Fernando Cirolini51,18,

Nicolas Clerc52, Roger E. Cohen53, Julia M. Comerford54, Johan Comparat1,2, Janaina Correa doNascimento55,18, Marie-Claude Cousinou56, Kevin Covey57, Jeffrey D. Crane33, Rupert Croft58, Katia Cunha59,

Jeremy Darling54, James W. Davidson Jr.60, Kyle Dawson24, Luiz Da Costa18,59, Gabriele Da Silva Ilha51,18,Alice Deconto Machado51,18, Timothee Delubac61, Nathan De Lee62,29, Axel De la Macorra15,

Sylvain De la Torre37, Aleksandar M. Diamond-Stanic28, John Donor19, Juan Jose Downes15,63, Niv Drory64,Cheng Du65, Helion Du Mas des Bourboux13, Tom Dwelly52, Garrett Ebelke60, Arthur Eigenbrot28,

Daniel J. Eisenstein66, Yvonne P. Elsworth67,68, Eric Emsellem69,70, Michael Eracleous43,44,Stephanie Escoffier56, Michael L. Evans8, Jesus Falcon-Barroso4,5, Xiaohui Fan71, Ginevra Favole1,2,

Emma Fernandez-Alvar15, J. G. Fernandez-Trincado72, Diane Feuillet31, Scott W. Fleming73,74,Andreu Font-Ribera16,46, Gordon Freischlad30,31, Peter Frinchaboy19, Hai Fu75, Yang Gao ()12,

Rafael A. Garcia76, R. Garcia-Dias4,5, D. A. Garcia-Hernandez4,5, Ana E. Garcia Perez4,5, Patrick Gaulme30,31,Junqiang Ge77, Douglas Geisler53, Bruce Gillespie20, Hector Gil Marin78,79, Leo Girardi80,18,

Daniel Goddard81, Yilen Gomez Maqueo Chew15, Violeta Gonzalez-Perez81, Kathleen Grabowski30,31,Paul Green66, Catherine J. Grier43,44, Thomas Grier19,82, Hong Guo12, Julien Guy83, Alex Hagen43,44,

Matt Hall60, Paul Harding84, R. E. Harley57, Sten Hasselquist31, Suzanne Hawley8, Christian R. Hayes60,Fred Hearty43, Saskia Hekker85, Hector Hernandez Toledo15, Shirley Ho 58,16, David W. Hogg36,

Kelly Holley-Bockelmann29, Jon A. Holtzman31, Parker H. Holzer24, Jian Hu ()64, Daniel Huber86,87,68,Timothy Alan Hutchinson24, Ho Seong Hwang50, Hector J. Ibarra-Medel15, Inese I. Ivans24, KeShawn Ivory19,88,

Kurt Jaehnig28, Trey W. Jensen24, Jennifer A. Johnson89,90, Amy Jones91, Eric Jullo37, T. Kallinger92,Karen Kinemuchi30,31, David Kirkby93, Mark Klaene30, Jean-Paul Kneib61, Juna A. Kollmeier33, Ivan Lacerna94,

Richard R. Lane94, Dustin Lang42, Pierre Laurent13, David R. Law73, Alexie Leauthaud46,Jean-Marc Le Goff13, Chen Li12, Cheng Li12,65, Niu Li65, Ran Li77, Fu-Heng Liang ()64, Yu Liang65,Marcos Lima47,18, Lihwai Lin ()94, Lin Lin ()12, Yen-Ting Lin ()94, Chao Liu77, Dan Long30,

Sara Lucatello80, Nicholas MacDonald8, Chelsea L. MacLeod66, J. Ted Mackereth96, Suvrath Mahadevan43,Marcio Antonio Geimba Maia18,59, Roberto Maiolino26,27, Steven R. Majewski60, Olena Malanushenko30,31,

Viktor Malanushenko30,31, Ncolas Dullius Mallmann55,18, Arturo Manchado4,5,97, Claudia Maraston81,Rui Marques-Chaves4,5, Inma Martinez Valpuesta4,5, Karen L. Masters81, Savita Mathur98, Ian D. McGreer71,

Andrea Merloni52, Michael R. Merrifield10, Szabolcs Meszaros99, Andres Meza100, Andrea Miglio67,Ivan Minchev7, Karan Molaverdikhani54,101, Antonio D. Montero-Dorta24, Benoit Mosser102, Demitri Muna89,90,

Adam Myers103, Preethi Nair104, Kirpal Nandra52, Melissa Ness101, Jeffrey A. Newman9, Robert C. Nichol81,David L. Nidever71, Christian Nitschelm11, Julia OConnell19, Audrey Oravetz30,31, Daniel J. Oravetz30,31,

Zachary Pace28, Nelson Padilla94, Nathalie Palanque-Delabrouille13, Kaike Pan30,31, John Parejko8,Isabelle Paris37, Changbom Park50, John A. Peacock105, Sebastien Peirani106,46, Marcos Pellejero-Ibanez4,5,

Samantha Penny81, Will J. Percival81, Jeffrey W. Percival28, Ismael Perez-Fournon4,5, Patrick Petitjean106,Matthew Pieri37, Marc H. Pinsonneault89, Alice Pisani56,106, Francisco Prada1,2,107, Abhishek Prakash9,

Natalie Price-Jones42, M. Jordan Raddick20, Mubdi Rahman20, Anand Raichoor13,Sandro Barboza Rembold51,18, A. M. Reyna57, James Rich13, Hannah Richstein19, Jethro Ridl52,

Rogemar A. Riffel51,18, Rogerio Riffel55,18, Hans-Walter Rix101, Annie C. Robin72, Constance M. Rockosi108,Sergio Rodrguez-Torres1, Thase S. Rodrigues80,109,18, Natalie Roe16, A. Roman Lopes110,

Carlos Roman-Zuniga111, Ashley J. Ross90, Graziano Rossi112, John Ruan8, Rossana Ruggeri81,Jessie C. Runnoe43,44, Salvador Salazar-Albornoz52, Mara Salvato52, Sebastian F. Sanchez15,

Ariel G. Sanchez52, Jose R. Sanchez-Gallego8, Baslio Xavier Santiago55,18, Ricardo Schiavon96,Jaderson S. Schimoia55,18, Eddie Schlafly16,113, David J. Schlegel16, Donald P. Schneider43,44,

Ralph Schonrich48, Mathias Schultheis114, Axel Schwope7, Hee-Jong Seo115, Aldo Serenelli116,Branimir Sesar101, Zhengyi Shao12, Matthew Shetrone117, Michael Shull54, Victor Silva Aguirre68,

M. F. Skrutskie60, Anze Slosar118, Michael Smith28, Verne V. Smith119, Jennifer Sobeck60, Garrett Somers89,29,Diogo Souto59, David V. Stark46, Keivan G. Stassun29, Matthias Steinmetz7, Dennis Stello86,120,

Thaisa Storchi Bergmann55,18, Michael A. Strauss121, Alina Streblyanska4,5, Guy S. Stringfellow54,Genaro Suarez111, Jing Sun19, Manuchehr Taghizadeh-Popp20, Baitian Tang53, Charling Tao65,56, Jamie Tayar89,

Mita Tembe60, Daniel Thomas81, Jeremy Tinker36, Rita Tojeiro22, Christy Tremonti28, Nicholas Troup60,Jonathan R. Trump43,113, Eduardo Unda-Sanzana11, O. Valenzuela15, Remco Van den Bosch101,

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Mariana Vargas-Magana122, Jose Alberto Vazquez118, Sandro Villanova53, M. Vivek24, Nicole Vogt31,David Wake123,124, Rene Walterbos31, Yuting Wang77,81, Enci Wang12, Benjamin Alan Weaver36,

Anne-Marie Weijmans22, David H. Weinberg89,90, Kyle B. Westfall81, David G. Whelan125, Eric Wilcots28,Vivienne Wild22, Rob A. Williams96, John Wilson60, W. M. Wood-Vasey9, Dominika Wylezalek20, Ting Xiao (

)12, Renbin Yan126, Meng Yang65, Jason E. Ybarra111,127, Christophe Yeche13, Fang-Ting Yuan12,Nadia Zakamska20, Olga Zamora4,5, Gail Zasowski20, Kai Zhang126, Cheng Zhao65, Gong-Bo Zhao77,81,

Zheng Zheng77, Zheng Zheng24, Zhi-Min Zhou77, Guangtun Zhu20,113, Joel C. Zinn89, Hu Zou77

Draft version September 26, 2017

Abstract

The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in July 2014.It pursues three core programs: the Apache Point Observatory Galactic Evolution Experiment 2(APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon OscillationSpectroscopic Survey (eBOSS). As well as its core program, eBOSS contains two major subprograms:the Time Domain Spectroscopic Survey (TDSS) and the SPectroscopic IDentification of ERositaSources (SPIDERS). This paper describes the first data release from SDSS-IV, Data Release 13(DR13). DR13 makes publicly available the first 1390 spatially resolved integral field unit obser-vations of nearby galaxies from MaNGA. It includes new observations from eBOSS, completing theSloan Extended QUasar, Emission-line galaxy, Luminous red galaxy Survey (SEQUELS), which alsotargeted variability-selected objects and X-ray selected objects. DR13 includes new reductions of theSDSS-III BOSS data, improving the spectrophotometric calibration and redshift classification, andnew reductions of the SDSS-III APOGEE-1 data, improving stellar parameters for dwarf stars andcooler stars. DR13 provides more robust and precise photometric calibrations. Value-added targetcatalogs relevant for eBOSS, TDSS, and SPIDERS and an updated red-clump catalog for APOGEEare also available. This paper describes the location and format of the data and provides referencesto important technical papers. The SDSS website, www.sdss.org, provides links to the data, tutori-als, examples of data access, and extensive documentation of the reduction and analysis procedures.DR13 is the first of a scheduled set that will contain new data and analyses from the planned 6-yearoperations of SDSS-IV.Subject headings: Atlases Catalogs Surveys

1 Instituto de Fsica Teorica, (UAM/CSIC), UniversidadAutonoma de Madrid, Cantoblanco, E-28049 Madrid, Spain

2 Campus of International Excellence UAM+CSIC, Canto-blanco, E-28049 Madrid, Spain

3 la Caixa-Severo Ochoa Scholar4 Instituto de Astrofsica de Canarias, E-38205 La Laguna,

Tenerife, Spain5 Departamento de Astrofsica, Universidad de La Laguna

(ULL), E-38206 La Laguna, Tenerife, Spain6 Instituto de Investigacion Multidisciplinario en Ciencia

y Tecnologa, Universidad de La Serena, Benavente 980, LaSerena, Chile

7 Leibniz-Institut fuer Astrophysik Potsdam (AIP), An derSternwarte 16, D-14482 Potsdam, Germany

8 Department of Astronomy, University of Wash