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The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogues and Measurement of the isotropic BAO between redshift 0.6 and 1.1 for the Emission Line Galaxy Sample
Anand Raichoor, Arnaud de Mattia, Ashley J. Ross, Cheng Zhao, Shadab Alam, Santiago Avila, Julian Bautista, Jonathan Brinkmann, Joel R. Brownstein, Etienne Burtin, Michael J. Chapman, Chia-Hsun Chuang, Johan Comparat, Kyle S. Dawson, Arjun Dey, Hélion du Mas des Bourboux, Jack Elvin-Poole, Violeta Gonzalez-Perez, Claudio Gorgoni, Jean-Paul Kneib, Hui Kong, Dustin Lang, John Moustakas, Adam D. Myers, Eva-Maria Müller, Seshadri Nadathur, Jeffrey A. Newman, Will J. Percival, Mehdi Rezaie, Graziano Rossi, Vanina Ruhlmann-Kleider, David J. Schlegel, Donald P. Schneider, Hee-Jong Seo, Amélie Tamone, Jeremy L. Tinker, Rita Tojeiro, M. Vivek, Christophe Yèche, Gong-Bo Zhao
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We present the Emission Line Galaxy (ELG) sample of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) from the Sloan Digital Sky Survey IV Data Release 16 (DR16). After describing the observations and redshift measurement for the 269,243 observed ELG spectra over 1170 deg², we present the large-scale structure catalogues, which are used for the cosmological analysis. These catalogues contain 173,736 reliable spectroscopic redshifts between 0.6 and 1.1, along with the associated random catalogues quantifying the extent of observations, and the appropriate weights to correct for non-cosmological fluctuations. We perform a spherically averaged baryon acoustic oscillations (BAO) measurement in configuration space, with density field reconstruction: the data 2-point correlation function shows a feature consistent with that of the BAO, providing a 3.2-percent measurement of the spherically averaged BAO distance D_V(z_(eff))/r_(drag) = 18.23±0.58 at the effective redshift z_(eff)=0.845.
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