Milliarcsecond X-ray astrometry to resolve inner regions of AGN at $z>1$ using gravitational lensing

C. Spingola, D. Schwartz, A. Barnacka

We report the localization of the X-ray emission from two strongly lensed AGN, CLASS B0712+472 ($z=1.34$) and CLASS B1608+656 ($z=1.394$). We obtain milliarcsecond X-ray astrometry…