Photometric redshifts of quasars

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dc.contributor.authorRichards, GT
dc.contributor.authorWeinstein, MA
dc.contributor.authorSchneider, DP
dc.contributor.authorFan, XH
dc.contributor.authorStrauss, MA
dc.contributor.authorVanden Berk, DE
dc.contributor.authorAnnis, J
dc.contributor.authorBurles, S
dc.contributor.authorLaubacher, EM
dc.contributor.authorYork, DG
dc.contributor.authorFrieman, JA
dc.contributor.authorJohnston, D
dc.contributor.authorScranton, R
dc.contributor.authorGunn, JE
dc.contributor.authorNichol, RC
dc.contributor.authorIvezic, Z
dc.contributor.authorNichol, RC
dc.contributor.authorBudavári, T
dc.contributor.authorCsabai, I
dc.contributor.authorSzalay, AS
dc.contributor.authorConnolly, AJ
dc.contributor.authorSzokoly, GP
dc.contributor.authorBahcall, NA
dc.contributor.authorBenítez, N
dc.contributor.authorBrinkmann, J
dc.contributor.authorBrunner, R
dc.contributor.authorFukugita, M
dc.contributor.authorHall, PB
dc.contributor.authorHennessy, GS
dc.contributor.authorKnapp, GR
dc.contributor.authorKunszt, PZ
dc.contributor.authorLamb, DQ
dc.contributor.authorMunn, JA
dc.contributor.authorNewberg, HJ
dc.contributor.authorStoughton, C
dc.date.accessioned2025-01-21T01:30:44Z
dc.date.available2025-01-21T01:30:44Z
dc.date.issued2001
dc.description.abstractWe 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 of quasars. Using a sample of 2625 quasars, we show that "photo-z" determination is even possible for z less than or equal to2.2 despite the lack of a strong continuum break, which 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 Deltaz = 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 similar to 10(6) quasar 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.
dc.fuente.origenWOS
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96873
dc.identifier.wosidWOS:000170997700005
dc.issue.numero3
dc.language.isoen
dc.pagina.final1162
dc.pagina.inicio1151
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectgalaxies : distances and redshifts
dc.subjectgalaxies : photometry
dc.subjectmethods : statistical
dc.subjectquasars : general
dc.titlePhotometric redshifts of quasars
dc.typeartículo
dc.volumen122
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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