SDSS J092455.87+021924.9: An interesting gravitationally lensed quasar from the Sloan Digital Sky Survey

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dc.contributor.authorInada, N
dc.contributor.authorBecker, RH
dc.contributor.authorBurles, S
dc.contributor.authorCastander, FJ
dc.contributor.authorEisenstein, D
dc.contributor.authorHall, PB
dc.contributor.authorJohnston, DE
dc.contributor.authorPindor, B
dc.contributor.authorRichards, GT
dc.contributor.authorSchechter, PL
dc.contributor.authorSekiguchi, M
dc.contributor.authorWhite, RL
dc.contributor.authorBrinkmann, J
dc.contributor.authorFrieman, JA
dc.contributor.authorKleinman, SJ
dc.contributor.authorKrzesinski, J
dc.contributor.authorLong, DC
dc.contributor.authorNeilsn, EH
dc.contributor.authorNewman, PR
dc.contributor.authorNitta, A
dc.contributor.authorSchneider, DP
dc.contributor.authorSnedden, S
dc.contributor.authorYork, DG
dc.date.accessioned2025-01-21T01:09:09Z
dc.date.available2025-01-21T01:09:09Z
dc.date.issued2003
dc.description.abstractWe report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J092455.87+021924.9 (SDSS J0924+0219). This object was selected from among known SDSS quasars by an algorithm that was designed to select another known SDSS lensed quasar (SDSS J1226-0006A,B). Five separate components, three of which are unresolved, are identified in photometric follow-up observations obtained with the Magellan Consortium's 6.5 m Walter Baade Telescope at Las Campanas Observatory. Two of the unresolved components (designated A and B) are confirmed to be quasars with z = 1.524; the velocity difference is less than 100 km s(-1) according to spectra taken with the W. M. Keck Observatory's Keck II Telescope at Mauna Kea, Hawaii. A third stellar component, designated C, has the colors of a quasar with redshift similar to components A and B. The maximum separation of the point sources is 1."78. The other two sources, designated G and D, are resolved. Component G appears to be the best candidate for the lensing galaxy. Although component D is near the expected position of the fourth lensed component in a four-image lens system, its properties are not consistent with being the image of a quasar at z similar to 1.5. Nevertheless, the identical redshifts of components A and B and the presence of component C strongly suggest that this object is a gravitational lens. Our observations support the idea that a foreground object reddens the fourth lensed component and that another unmodeled effect (such as micro- or millilensing) demagnifies it, but we cannot rule out the possibility that SDSS J0924+0219 is an example of the relatively rare class of "three-component'' lens systems.
dc.fuente.origenWOS
dc.identifier.eissn1538-3881
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96552
dc.identifier.wosidWOS:000184446600005
dc.issue.numero2
dc.language.isoen
dc.pagina.final674
dc.pagina.inicio666
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectgravitational lensing
dc.subjectquasars : individual (SDSS J092455.87+021924.9)
dc.titleSDSS J092455.87+021924.9: An interesting gravitationally lensed quasar from the Sloan Digital Sky Survey
dc.typeartículo
dc.volumen126
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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