This paper provides the compilations of properties of the quasars newly obtained by the Sloan Digital Sky Survey (SDSS) during the fourth stage (SDSS-IV). The catalog is available on the journal's website. We have measured the main properties of emission lines around C $$\tiny{IV}$$ Mg $$\tiny{II}$$, Hβ, and Hα spectral regions. We estimate the quasar redshifts from our fits of narrow [O $$\tiny{III}$$], broad Mg $$\tiny{II}$$, and broad C $$\tiny{IV}$$ emission lines and find that the best redshifts included in DR16Q are robust with respect to our measurements. Based on the broad C $$\tiny{IV}$$, Mg $$\tiny{II}$$, Hβ, and/or Hα emission lines, we calculate the virial black hole mass with empirical relationships provided by previous works. Systematic biases are found among the different line-based mass estimators.
Huang, Wei-Rong, et al. "Quasar Properties from the Sloan Digital Sky Survey. III. The Quasars Obtained by the SDSS-IV." The Astrophysical Journal. Supplement Series, vol. 264, no. 2, Feb. 2023. https://doi.org/10.3847/1538-4365/aca6e2
Huang, Wei-Rong, Chen, Zhe-Geng, Chen, Zhi-Fu, & Li, Xiao-Feng (2023). Quasar Properties from the Sloan Digital Sky Survey. III. The Quasars Obtained by the SDSS-IV. The Astrophysical Journal. Supplement Series, 264(2). https://doi.org/10.3847/1538-4365/aca6e2
Huang, Wei-Rong, Chen, Zhe-Geng, Chen, Zhi-Fu, et al., "Quasar Properties from the Sloan Digital Sky Survey. III. The Quasars Obtained by the SDSS-IV," The Astrophysical Journal. Supplement Series 264, no. 2 (2023), https://doi.org/10.3847/1538-4365/aca6e2
@article{osti_2425265,
author = {Huang, Wei-Rong and Chen, Zhe-Geng and Chen, Zhi-Fu and Li, Xiao-Feng},
title = {Quasar Properties from the Sloan Digital Sky Survey. III. The Quasars Obtained by the SDSS-IV},
annote = {This paper provides the compilations of properties of the quasars newly obtained by the Sloan Digital Sky Survey (SDSS) during the fourth stage (SDSS-IV). The catalog is available on the journal's website. We have measured the main properties of emission lines around C $\tiny{IV}$ Mg $\tiny{II}$, Hβ, and Hα spectral regions. We estimate the quasar redshifts from our fits of narrow [O $\tiny{III}$], broad Mg $\tiny{II}$, and broad C $\tiny{IV}$ emission lines and find that the best redshifts included in DR16Q are robust with respect to our measurements. Based on the broad C $\tiny{IV}$, Mg $\tiny{II}$, Hβ, and/or Hα emission lines, we calculate the virial black hole mass with empirical relationships provided by previous works. Systematic biases are found among the different line-based mass estimators.},
doi = {10.3847/1538-4365/aca6e2},
url = {https://www.osti.gov/biblio/2425265},
journal = {The Astrophysical Journal. Supplement Series},
issn = {ISSN 0067-0049},
number = {2},
volume = {264},
place = {United States},
publisher = {IOP Publishing},
year = {2023},
month = {02}}