Discovery of a z = 4.93, X-Ray-selected Quasar by the Chandra Multiwavelength Project (ChaMP)

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dc.contributor.authorSilverman, J.D.
dc.contributor.authorGreen, P.J.
dc.contributor.authorKim, D.W.
dc.contributor.authorWilkes, B.J.
dc.contributor.authorCameron, R.A.
dc.contributor.authorMorris, D.
dc.contributor.authorDosaj, A.
dc.contributor.authorSmith, C.
dc.contributor.authorInfante, L.
dc.contributor.authorSmith, P.S.
dc.contributor.authorJannuzi, B.T.
dc.contributor.authorMathur, S.
dc.date.accessioned2025-01-21T01:30:27Z
dc.date.available2025-01-21T01:30:27Z
dc.date.issued2002
dc.description.abstractWe present X-ray and optical observations of CXOMP J213945.0-234655, a high-redshift (z = 4.93) quasar discovered through the Chandra Multiwavelength Project (ChaMP). This object is the most distant X-ray-selected quasar published, with a rest-frame X-ray luminosity of L-x = 5.9 x 10(44) ergs s(-1) (measured in the 0.3-2.5 keV band and corrected for Galactic absorption). CXOMP J213945.0-234655 is a g' dropout object (>26.2), with r' = 22.87 and i' = 21.36. The rest- frame X-ray-to-optical flux ratio is similar to quasars at lower redshifts and slightly X-ray bright relative to z > 4 optically selected quasars observed with Chandra. The ChaMP is beginning to acquire significant numbers of high-redshift quasars to investigate the X-ray luminosity function out to. z similar to 5.
dc.fechaingreso.objetodigital2025-07-26
dc.fuente.origenWOS
dc.identifier.doi10.1086/340458
dc.identifier.issn0004-637X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96761
dc.identifier.wosidWOS:000174879000001
dc.issue.numeroNo. 1
dc.language.isoen
dc.nota.accesocontenido completo
dc.pagina.finalL4
dc.pagina.inicioL1
dc.revistaAstrophysical Journal
dc.rightsacceso abierto
dc.subjectgalaxies : active
dc.subjectgalaxies : nuclei
dc.subjectquasars : general
dc.subjectquasars : individual (CXOMP J213945.0-234655)
dc.subjectX-rays : general
dc.titleDiscovery of a z = 4.93, X-Ray-selected Quasar by the Chandra Multiwavelength Project (ChaMP)
dc.typeartículo
dc.volumenVol. 569
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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