Strong gravitational lensing of quasars has the potential to unlock the poorly understood
physics of these fascinating objects, as well as serve as a probe of the lensing mass …

We present new light curves for the four bright images of the five image cluster-lensed
quasar gravitational lens system SDSS J1004+ 4112. The light curves span 14.5 yr and …

ABSTRACT SDSS J1004+ 4112 is a well-studied gravitational lens with a recently
measured time delay between its first and fourth arriving quasar images. Using this new …

We have built a new model for the lens system SDSS J1004+ 4112 including the recently
measured time delay of the fourth quasar image. This time delay has a strong influence on …

J1004+ 4112 is a lensed quasar for which the first broad emission line profile deformations
due to microlensing were identified. Detailed interpretations of these features have …

We introduce the use of the fast multipole method (FMM) to speed up gravitational lensing
ray tracing calculations. The method allows very fast calculation of ray deflections when a …

The radio quasar luminosity function exhibits an upturn around W Hz− 1 that is well-
modelled by a star-forming host galaxy population. This distribution leads some authors to …

Line profile distortions are commonly observed in gravitationally lensed quasar spectra.
These distortions are caused by microlensing from the stars in the lensing galaxy, which …

We introduce a novel method to derive rotation curves with light-day spatial resolution of the
inner regions of lensed quasars. We aim to probe the kinematics of the inner part of the …

Aims. We aim to reveal the sizes of the continuum and broad emission line (BEL) emitting
regions in the gravitationally lensed quasar SDSS J1004+ 4112 by analyzing the unique …