A CATALOG OF QUASAR PROPERTIES FROM SLOAN DIGITAL SKY SURVEY DATA RELEASE 7

By Yue Shen, Gordon Richards, M. Strauss, P. Hall, D. Schneider, S. Snedden, D. Bizyaev, H. Brewington, V. Malanushenko, E. Malanushenko and 3 more. 2010

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We present a compilation of properties of the 105,783 quasars in the Sloan Digital Sky Survey Data Release 7 (DR7) quasar catalog. In this product, we compile continuum and emission line measurements around the Hα, Hβ, Mg ii, and C iv regions, as well as other quantities such as radio properties, and flags indicating broad absorption line quasars, disk emitters, etc. We also compile virial black hole mass estimates based on various calibrations. For the fiducial virial mass estimates we use the Vestergaard & Peterson (VP06) calibrations for Hβ and C iv, and our own calibration for Mg ii which matches the VP06 Hβ masses on average. We describe the construction of this catalog and discuss its limitations. The catalog and its future updates will be made publicly available online.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/bfdc5cf28c4f11a756c759f6ad8dcfe51a2d43e3

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Citations in the corpus

Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IX. 10 New Observations of Reverberation Mapping and Shortened Hβ Lags (2018, methodology): “The RHβ–L5100 relation, combined with Equation (1), has been extensively adopted as a BH mass estimator from single-epoch spectroscopy (e.g., McLure & Dunlop 2002; Vestergaard & Peterson 2006; Shen et al. 2011; Ho & Kim 2015).”
AGN wind scaling relations and the co-evolution of black holes and galaxies (2017, methodology): “In particular, we used QSOs from Borguet et al. (2013), Moe et al. (2009), Dunn et al. (2010), Korista et al. (2008), Shen et al. (2011).”
Physical Properties of 15 Quasars at z ≳ 6.5 (2017, methodology): “In Figure 7 we show the distribution of the blueshifts for high−redshift quasars in this work (bottom panel) and for a sample of objects at lower redshift taken from the SDSS−DR7 catalog (Shen et al. 2011; upper panel).”
SPECTROSCOPY OF BROAD-LINE BLAZARS FROM 1LAC (2012, methodology): “For the magnitude-cut sub-sample (directly comparable to the SDSS QSO), the offset is 0.34 dex.”
A systematic search for close supermassive black hole binaries in the Catalina Real-time Transient Survey (2015, background): “Virial black hole mass estimates (Shen et al. 2011) are available for 88,000 quasars in our sample (of which 23 per cent have z > 2).”
The Sloan Digital Sky Survey quasar catalog: ninth data release (2012, methodology): “While we strictly limited the equivalent width computation to the 1,500-1,600 Å range, Shen et al. (2011) used this range to fit the line but accounted for the extra wings to estimate the rest frame equivalent width.”
Evolution of binary black holes in self gravitating discs. Dissecting the torques (2012, background): “…corroborated by several observed quasar pairs at a ∼ 100kpc projected separation (Hennawi et al. 2006; Myers et al. 2007, 2008; Foreman et al. 2009; Shen et al. 2011), and by few ∼< kpc dual accreting BHs embedded in the same galaxy (e.g. Komossa et al. 2003; Fabbiano et al. 2011),…”
The dust covering factor in active galactic nuclei (2016, background): “However, the correction factors adopted by different authors differ significantly (e.g. Shen et al. 2011; Trakhtenbrot & Netzer 2012; Runnoe et al. 2012; Krawczyk et al. 2013).”
The Sloan Digital Sky Survey Reverberation Mapping Project: Hα and Hβ Reverberation Measurements from First-year Spectroscopy and Photometry (2017, background): “…the radiusluminosity (R − L) relationship (e.g., Kaspi et al. 2007; Bentz et al. 2013), which allows one to estimate the BLR size with a single spectrum and thus estimate MBH for large numbers of quasars at greater distances where traditional RM campaigns are impractical (e.g., Shen et al. 2011).”
The first ultraviolet quasar-stacked spectrum at z ≃ 2.4 from WFC3 (2015, methodology): “Mi(z = 2) is the mean absolute i-band magnitude normalized at z = 2 (Shen et al. 2011), M1450 and M912 are the absolute magnitudes at 1450 and 912 Å , respectively, estimated from our WFC3 stack.”
Data Release 1 of the Dark Energy Spectroscopic Instrument (2025, neutral): “Additionally, we integrate fitting results from the FastSpecFit VAC and offer alternative mass estimates based on the formulations by Y. Shen et al. ( 2011 ) , H. A. N. Le et al. ( 2020 ) , and Z. Yu et al. ( 2023 ) , providing users with flexibility in choosing their preferred estimator.”
Black Hole Growth to z = 2 - I: Improved Virial Methods for Measuring M_BH and L/L_Edd (2012, background): “At lower redshifts the fractions are lower, and only ∼ 68% of our Hβ -only SDSS sources can be found within the Shen et al. (2011) catalog.”
A HUBBLE DIAGRAM FOR QUASARS (2015, methodology): “In our work, we adopted the published X-ray fluxes for most sources while updating the FUV estimates whenever possible using the available multi-color information compiled in the COSMOS, SDSS-DR7, and BOSS-DR10 quasar catalogs.”