The discovery of a high redshift type 2 QSO
Abstract
We 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.
Keywords
Cite
@article{arxiv.astro-ph/9509015,
title = {The discovery of a high redshift type 2 QSO},
author = {O. Almaini and B. J. Boyle and R. E. Griffiths and T. Shanks and G. C. Stewart and I. Georgantopoulos},
journal= {arXiv preprint arXiv:astro-ph/9509015},
year = {2007}
}
Comments
uuencoded compressed postscript. The preprint is also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html