VizieR Online Data Catalog: TDSS. Changing-look quasars candidates (Green+, 2022)
Abstract
Our parent sample consists of a subset of objects classified as quasars by the SDSS pipeline that appear in the SDSS Data Release 14 (DR14) quasar catalog (Paris et al., 2018, Cat. VII/286), which included 526356 quasars. All the reduced and calibrated SDSS spectra analyzed herein were publicly released as part of SDSS DR14, which includes data through 2016 May 11. The SDSS-IV final quasar catalog DR16 (Lyke et al., 2020, Cat. VII/289/) describes an additional 225082 new quasars, and additional epochs obtained for previously known SDSS quasars.
Table 2 lists all 61 changing-look quasars (CLQ) candidates in our visually selected DR14 quasar sample, their redshifts, spectral epochs, and associated telescopes, along with best-fit modeled values for their continuum luminosities at 2800, 3240, and 5100Å. Emission line luminosities and their uncertainties are provided for Hβ and MgII, where available. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- March 2023
- Bibcode:
- 2023yCat..19330180G
- Keywords:
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- QSOs;
- Active gal. nuclei;
- Redshifts;
- Optical;
- Ultraviolet