Browsing by Keyword "X Ray Sources"
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Accurate galactic N(H) values towards quasars and AGN
(IOP Publishing, 1989)Integrated Galactic 21-cm column densities toward about 174 quasars and AGN are presented. The data are corrected for stray radiation, using the technique of Lockman et al. (1986). Because of the 21-arcmin beam size of the ... -
The ROSAT spectrum of 3C 351 - A warm absorber in an X-ray-'quiet' quasar?
(IOP Publishing, 1993)3C 351 is one of the most X-ray-quiet radio quasars (alpha(ox) about 1.6). We have observed 3C 351 with the ROSAT position sensitive proportional counter (PSPC) and find a complex X-ray spectrum which is not well reproduced ...