Browsing by Author "Guzmán, Rafael"

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    • High-redshift x-ray–selected quasars: CXOCY J125304.0_090737 joins the club 
      Castander, Francisco J.; Treister, Ezequiel; Maccarone, Thomas J.; Coppi, Paolo S.; Maza Sancho, José; Zepf, Septenio E.; Guzmán, Rafael (2003-04)
      We present a new X-ray–selected high-redshift quasar CXOCY J125304.0 090737 at z = 4.179, discovered by the Cala´n-Yale Deep Extragalactic Research (CYDER) Survey. This quasar is the fifth X-ray– selected high-redshift ...