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…