Since the amount of brightening due to gravitational lensing doesn't vary with the wavelength, this means that an additional object has magnified the X-rays.

The increased magnification of the X-ray light can be explained by gravitational microlensing, an effect which has been used to search for compact stars and planets in our galaxy.

The analysis indicates that the X-rays are coming from a very small region, about the size of the Solar System, around the central black hole.

[6] Additionally, inner regions of the quasar's accretion disk around the black hole has been detected suggesting outflow wind.

[7] Data from NICMOS and a special algorithm resolved the lensing galaxy and a partial Einstein ring.