A Catalog of Quasar Properties from SDSS DR7

TL;DR

This paper compiles a comprehensive catalog of over 105,000 quasars from SDSS DR7, including spectral, radio, and black hole mass data, serving as a valuable resource for quasar research.

Contribution

It provides a detailed, publicly available catalog of quasar properties with standardized measurements and virial black hole mass estimates, enhancing data accessibility for researchers.

Findings

Catalog includes measurements for 105,783 quasars from SDSS DR7.

Provides virial black hole mass estimates using multiple calibrations.

Includes data on emission lines, radio properties, and BALQSO flags.

Abstract

We present a compilation of properties of the 105,783 quasars in the SDSS Data Release 7 (DR7) quasar catalog. In this value-added product, we compile continuum and emission line measurements around the Halpha, Hbeta, MgII and CIV regions, as well as other quantities such as radio properties, broad absorption line quasar (BALQSO) flags, and disk emitters. 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 Hbeta and CIV, and our own calibration for MgII which matches the VP06 Hbeta 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.