The magnifications of compact-source lenses are extremely sensitive to the presence of low-
mass dark matter haloes along the entire sightline from the source to the observer …

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 …

ABSTRACT A new window to observing individual stars and other small sources at
cosmological distances was opened recently, with the detection of several caustic-crossing …

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 …

We present an improved inverse-ray-shooting code based on graphics processing units
(GPUs) to generate microlensing magnification maps. In addition to introducing GPUs to …

Aims. We aim to study the structure and kinematics of the broad line region (BLR) of a
sample of 27 gravitationally lensed quasars with up to five different epochs of observation …

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 present spectroscopic confirmation of three new two-image gravitationally lensed
quasars, compiled from existing strong lens and X-ray catalogues. Images of HSC J091843 …

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 …