In addition to the primary SDSS photometry and spectroscopy, there are a few extra catalogs created by our collaborators that are distributed through the SAS. These Value-Added Catalogs (VACs) are listed below, and include catalogs that were released in earlier data releases.
The Sloan Digital Sky Survey DR19 quasar spectral property catalog
Spectral properties for BHM DR19 quasars, including detailed spectral measurements and derived physical properties
Catalog Data
Abstract
This quasar value-added catalog provides detailed measurements of the spectral properties for 82,363 quasars observed in SDSS-V Data Release 19. This catalog is built upon careful visual inspection of quasar candidate spectra to ensure accurate classifications and correct erroneous pipeline redshifts. Following previous work on A Catalog of Quasar Properties from Sloan Digital Sky Survey Data Release 16 , see also Wu & Shen (2022), we measured the quasar spectral properties using the publicly available code PyQSOFit with priors for host galaxy decomposition. The catalog includes fundamental spectral parameters such as continuum (e.g., power-law slope) and emission line measurements (e.g., FWHM, EW, peak wavelength), as well as derived physical properties (e.g., virial black hole masses, bolometric luminosities, and systemic redshifts). This catalog serves the extragalactic community with a comprehensive dataset for investigating topics such as supermassive black hole growth, accretion processes, and the co-evolution of quasars and their host galaxies. Detailed descriptions of the VAC columns and tutorials are available in the VAC author's GitHub here. The tutorials are also on the main SDSS DR19 tutorial GitHub page.
Catalog last modified: 2025-07-10 11:47:15