VizieR Online Data Catalog: A new photo-z method for quasars in Stripe 82 (Yang+, 2017)
Abstract
We use a sample of spectroscopically identified quasars consisting of quasars from the SDSS Data Release 7 Quasar catalog (DR7Q; Schneider et al. 2010, Cat. VII/260) and the Data Release 12 Quasar catalog (DR12Q; Paris et al. 2017, Cat. VII/279). The DESI Legacy imaging survey (DELS; A. Dey et al. 2018arXiv180408657D) will provide images for target selection, including the DECam Legacy Survey (DECaLS) in the g, r, and z bands. In this work, we use the three-band (grz) photometry from the DECaLS DR3. We test the quasar candidate selection algorithm described in Section 5.3 with the DECaLS g, r, z and WISE W1 and W2 photometry. There is a 15 deg2 region (36°<RA<42° and -1.25°<DE<1.25) in S82 with spectroscopically identified quasars as dense as 167 per deg2.
(1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- September 2018
- DOI:
- 10.26093/cds/vizier.51540269
- Bibcode:
- 2018yCat..51540269Y
- Keywords:
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- QSOs;
- Photometry: ugriz;
- Redshifts;
- Models