ИСТИНА

We present the second version of the RCSED catalog (Chilingatian et al, 2017) https://rcsed2.voxastro.org/ containing spectral and photometric data with analysis results for more than 4 million extragalactic objects. The initial sample of galaxies was taken from a dozen public sky surveys, both spectral (SDSS, LAMOST, Hectospec, 2dF, etc.) and photometric (SDSS, UKIDSS, GALEX, WISE, etc.). To analyze the spectra, we use our own procedures based on NBursts (Chilingarian et al, 2007). It allows us to determine the parameters of stellar populations (age and metallicity) based on model grids (PEGASE, MILES, X-SHOOTER), and also calculates fluxes for different sets of emission lines. Emission templates are determined automatically for each individual spectrum and are used to further determine gas properties (metallicity and ionization parameter) using the IZI procedure (Blanc et al, 2015). As a result, for a large number of extragalactic sources, we obtained a complete and homogeneous set of analysis results, which can be used for further statistical analysis and study of the evolution of galaxies.