Journal article
Photometric Redshifts of Quasars
The Astronomical journal, v 122(3), pp 1151-1162
03 Jun 2001
Abstract
Astron.J. 122 (2001) 1151 We demonstrate that the design of the Sloan Digital Sky Survey (SDSS) filter
system and the quality of the SDSS imaging data are sufficient for determining
accurate and precise photometric redshifts (``photo-z''s) of quasars. Using a
sample of 2625 quasars, we show that photo-z determination is even possible for
z<=2.2 despite the lack of a strong continuum break that robust photo-z
techniques normally require. We find that, using our empirical method on our
sample of objects known to be quasars, approximately 70% of the photometric
redshifts are correct to within delta z = 0.2; the fraction of correct
photometric redshifts is even better for z>3. The accuracy of quasar
photometric redshifts does not appear to be dependent upon magnitude to nearly
21st magnitude in i'. Careful calibration of the color-redshift relation to
21st magnitude may allow for the discovery of on the order of 10^6 quasars
candidates in addition to the 10^5 quasars that the SDSS will confirm
spectroscopically. We discuss the efficient selection of quasar candidates from
imaging data for use with the photometric redshift technique and the potential
scientific uses of a large sample of quasar candidates with photometric
redshifts.
Metrics
Details
- Title
- Photometric Redshifts of Quasars
- Creators
- Gordon T Richards - Pennsylvania State UniversityMichael A Weinstein - Pennsylvania State UniversityDonald P Schneider - Pennsylvania State UniversityXiaohui Fan - EarthTech InternationalMichael A Strauss - Princeton UniversityDaniel E. Vanden Berk - Fermilab
- Publication Details
- The Astronomical journal, v 122(3), pp 1151-1162
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000170997700005
- Scopus ID
- 2-s2.0-18044374160
- Other Identifier
- 991019201216204721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics