RCSEDv2: Processing and analysis of 4+ million galaxy spectra
  RCSEDv2 (https://rcsed2.voxastro.org/), the second Reference Catalog of
Spectral Energy Distributions of galaxies, provides the largest homogeneously
analyzed collection of optical galaxy spectra originating from several
ground-based surveys collected between 1994 and 2019. The database contains
astrophysical parameters obtained using the same data analysis approach from a
sample of over 4 million optical spectra of galaxies and quasars: kinematics of
stellar populations and ionized gas, chemical composition and age of stellar
populations, gas phase metallicity. The dataset is available via Virtual
Observatory access interfaces (IVOA TAP and SSAP) and through the web-site.
Here we describe the RCSEDv2 spectroscopic dataset and the data processing and
analysis.
