2 papers
astro-ph1999
The Gravitationally Lensed Quasar Q2237+0305 in X-rays: ROSAT/HRI Detection of the "Einstein Cross"
Joachim Wambsganss, Hermann Brunner, Sabine Schindler +1
We report the first detection of the gravitationally lensed quasar Q2237+0305 in X-rays. With a ROSAT/HRI exposure of 53 ksec taken in Nov./Dec. 1997, we found a count rate of 0.00…
astro-ph1997
UV to X-ray Spectra of Radio-Quiet Quasars. Comparison With Accretion Disk Models
H. Brunner, C. Mueller, P. Friedrich +3
We present UV to soft X-ray spectra of 31 radio-quiet quasars, comprising data from the IUE ULDA database and the ROSAT pointed observation phase. 90 % of the sample members show a…