The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
Creators: name: Almeida, Andrés
name: Anderson, Scott F.
name: Argudo-Fernández, Maria
name: Badenes, Carles
name: Barger, Kat
name: Barrera-Ballesteros, Jorge K.
name: Bender, Chad F.
name: Benitez, Erika
name: Besser, Felipe
name: Bizyaev, Dmitry
name: Blanton, Michael R.
name: Bochanski, John
name: Bovy, Jo
name: Brandt, William Nielsen
name: Brownstein, Joel R.
name: Buchner, Johannes
name: Bulbul, Esra
name: Burchett, Joseph N.
name: Díaz, Mariana Cano
name: Carlberg, Joleen K.
name: Casey, Andrew R.
name: Chandra, Vedant
name: Cherinka, Brian
name: Chiappini, Cristina
name: Coker, Abigail A.
name: Comparat, Johan
name: Conroy, Charlie
name: Contardo, Gabriella
name: Cortes, Arlin
name: Covey, Kevin
name: Crane, Jeffrey D.
name: Cunha, Katia
name: Dabbieri, Collin
name: Davidson, James W.
name: Davis, Megan C.
name: De Lee, Nathan
name: Delgado, José Eduardo Méndez
name: Demasi, Sebastian
name: Di Mille, Francesco
name: Donor, John
name: Dow, Peter
name: Dwelly, Tom
name: Eracleous, Mike
name: Eriksen, Jamey
name: Fan, Xiaohui
name: Farr, Emily
name: Frederick, Sara
name: Fries, Logan
name: Frinchaboy, Peter
name: Gaensicke, Boris T.
name: Ge, Junqiang
name: Ávila, Consuelo González
name: Grabowski, Katie
name: Grier, Catherine
name: Guiglion, Guillaume
name: Gupta, Pramod
name: Hall, Patrick
name: Hawkins, Keith
name: Hayes, Christian R.
name: Hermes, J. J.
name: Hernández-García, Lorena
name: Hogg, David W.
name: Holtzman, Jon A.
name: Ibarra-Medel, Hector Javier
name: Ji, Alexander
name: Jofre, Paula
name: Johnson, Jennifer A.
name: Jones, Amy M.
name: Kinemuchi, Karen
name: Kluge, Matthias
name: Koekemoer, Anton
name: Kollmeier, Juna A.
name: Kounkel, Marina
name: Krishnarao, Dhanesh
name: Krumpe, Mirko
name: Lacerna, Ivan
name: Lago, Paulo Jakson Assuncao
name: Laporte, Chervin
name: Liu, Ang
name: Liu, Chao
name: Liu, Xin
name: Lopes, Alexandre Roman
name: Macktoobian, Matin
name: Majewski, Steven R.
name: Malanushenko, Viktor
name: Maoz, Dan
name: Masseron, Thomas
name: Masters, Karen L.
name: Matijevic, Gal
name: McBride, Aidan
name: Medan, Ilija
name: Merloni, Andrea
name: Morrison, Sean
name: Myers, Natalie
name: Mészáros, Szabolcs
name: Negrete, C. Alenka
name: Nidever, David L.
name: Nitschelm, Christian
name: Oravetz, Audrey
name: Oravetz, Daniel
name: Pan, Kaike
name: Peng, Yingjie
name: Pinsonneault, Marc H.
name: Pogge, Rick
name: Qiu, Dan
name: Queiroz, Anna Barbara de Andrade
name: Ramirez, Solange V.
name: Rix, Hans-Walter
name: Rosso, Daniela Fernández
name: Runnoe, Jessie
name: Salvato, Mara
name: Sanchez, Sebastian F.
name: Santana, Felipe A.
name: Saydjari, Andrew
name: Sayres, Conor
name: Schlaufman, Kevin C.
name: Schneider, Donald P.
name: Schwope, Axel
name: Serna, Javier
name: Shen, Yue
name: Sobeck, Jennifer
name: Song, Ying-Yi
name: Souto, Diogo
name: Spoo, Taylor
name: Stassun, Keivan G.
name: Steinmetz, Matthias
name: Straumit, Ilya
name: Stringfellow, Guy
name: Sánchez-Gallego, José
name: Taghizadeh-Popp, Manuchehr
name: Tayar, Jamie
name: Thakar, Ani
name: Tissera, Patricia B.
name: Tkachenko, Andrew
name: Toledo, Hector Hernandez
name: Trakhtenbrot, Benny
name: Trincado, Jose G. Fernandez
name: Troup, Nicholas
name: Trump, Jonathan R.
name: Tuttle, Sarah
name: Ulloa, Natalie
name: Vazquez-Mata, Jose Antonio
name: Alfaro, Pablo Vera
name: Villanova, Sandro
name: Wachter, Stefanie
name: Weijmans, Anne-Marie
name: Wheeler, Adam
name: Wilson, John
name: Wojno, Leigh
name: Wolf, Julien
name: Xue, Xiang-Xiang
name: Ybarra, Jason E.
name: Zari, Eleonora
name: Zasowski, Gail
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific programs, or "Mappers": Milky Way Mapper (MWM), Black Hole Mapper (BHM), and Local Volume Mapper (LVM). This data release contains extensive targeting information for the two multi-object spectroscopy programs (MWM and BHM), including input catalogs and selection functions for their numerous scientific objectives. We describe the production of the targeting databases and their calibration- and scientifically-focused components. DR18 also includes ~25,000 new SDSS spectra and supplemental information for X-ray sources identified by eROSITA in its eFEDS field. We present updates to some of the SDSS software pipelines and preview changes anticipated for DR19. We also describe three value-added catalogs (VACs) based on SDSS-IV data that have been published since DR17, and one VAC based on the SDSS-V data in the eFEDS field.
description: Accepted to ApJS