The discovery of a high redshift type 2 QSO

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dc.creatorAlmaini, O.
dc.creatorBoyle, B. J.
dc.creatorGriffiths, R. E.
dc.creatorShanks, T.
dc.creatorStewart, G. C.
dc.creatorGeorgantopoulos, I.
dc.date1995-09-04
dc.date.accessioned2026-07-07T02:20:06Z
dc.date.available2026-07-07T02:20:06Z
dc.descriptionWe report the discovery of a high redshift, narrow emission-line galaxy identified in the optical follow-up of deep ROSAT fields. The object has a redshift of z=2.35 and its narrow emission lines together with its high optical and X-ray luminosity imply that this is a rare example of a type 2 QSO. The intrinsic X-ray absorption is either very low or we are observing scattered flux which does not come directly from the nucleus. The X-ray spectrum of this object is harder than that of normal QSOs, and it is possible that a hitherto unidentified population of similar objects at fainter X-ray fluxes could account for the missing hard component of the X-ray background.
dc.descriptionuuencoded compressed postscript. The preprint is also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html
dc.identifierhttps://arxiv.org/abs/astro-ph/9509015
dc.identifierhttp://arxiv.org/abs/astro-ph/9509015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/10111
dc.subjectAstrophysics
dc.titleThe discovery of a high redshift type 2 QSO
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