A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …

Weak gravitational lensing, the deflection of light by mass, is one of the best tools to
constrain the growth of cosmic structure with time and reveal the nature of dark energy. I …

We present a blind time-delay strong lensing (TDSL) cosmographic analysis of the doubly
imaged quasar SDSS 1206+ 4332. We combine the relative time delay between the quasar …

We present cosmological parameter constraints from a tomographic weak gravitational
lensing analysis of∼ 450 deg2 of imaging data from the Kilo Degree Survey (KiDS). For a …

Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey
with the OmegaCAM camera at the VLT Survey Telescope, specifically designed for …

Determining the distribution of redshifts of galaxies observed by wide-field photometric
experiments like the Dark Energy Survey (DES) is an essential component to mapping the …

We present the measurement of the Hubble constant, H 0, with three strong gravitational
lens systems. We describe a blind analysis of both PG 1115+ 080 and HE 0435− 1223 as …

Cosmic shear is the distortion of images of distant galaxies due to weak gravitational lensing
by the large-scale structure in the Universe. Such images are coherently deformed by the …

We perform a combined analysis of cosmic shear tomography, galaxy–galaxy lensing
tomography, and redshift-space multipole power spectra (monopole and quadrupole) using …

We describe the creation, content, and validation of the Dark Energy Survey (DES) internal
year-one cosmology data set, Y1A1 GOLD, in support of upcoming cosmological analyses …