A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is
We describe a program aimed at characterizing the X-ray emission of high redshift QSOs. We have obtained slitless spectra of 50 high galactic latitude fields previously imaged at very high levels of sensitivity by the Einstein Observatory, generally for original goals unrelated to QSOs. Our survey, covering ~ 17 deg 2 of sky to limiting magnitude B con t ~ 21, has yielded ~ 400 previously uncatalogued QSO candidates, each with sensitive new X-ray information available. About 100 of thesedoi:10.1007/978-94-009-4716-0_63 fatcat:5piajynvnbgopmiwojltqr7zky