{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/improved-redshifts-for-desi-edr-quasars","title":"Improved Redshifts for DESI EDR Quasars","arxiv_id":"2308.15586","date":"2023-08-29","proceeding":null,"authors":["Qiaoya Wu","Yue Shen"],"abstract":"The Dark Energy Spectroscopic Instrument (DESI) survey will provide optical spectra for $\\sim 3$ million quasars. Accurate redshifts for these quasars will facilitate a broad range of science applications. Here we provide improved systemic redshift estimates for the $\\sim 95$k quasars included in the DESI Early Data Release (EDR), based on emission-line fits to the quasar spectra. The majority of the DESI pipeline redshifts are reliable. However, $\\sim 19\\%$ of the EDR quasars have pipeline redshifts that deviate from our new redshifts by $>500\\,{\\rm km\\,s^{-1}}$. We use composite quasar spectra to demonstrate the improvement of our redshift estimates, particularly at $z>1$. These new redshifts are available at \\url{https://github.com/QiaoyaWu/DESI_EDR_qsofit/blob/main/DESI_EDR_Aug29_redshift_only.fits}.","url_abs":"https://arxiv.org/abs/2308.15586v1","url_pdf":"https://arxiv.org/pdf/2308.15586v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"improved-redshifts-for-desi-edr-quasars","repo_url":"https://github.com/qiaoyawu/desi_edr_qsofit","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}