We report the discovery of eight new Milky Way companions in $\sim 1800\;{\mathrm {deg}}^{2}
$ of optical imaging data collected during the first year of the Dark Energy Survey (DES). …

We search for excess γ-ray emission coincident with the positions of confirmed and candidate
Milky Way satellite galaxies using six years of data from the Fermi Large Area Telescope (…

We present the Dark Energy Camera (DECam) discovery of the optical counterpart of the first
binary neutron star merger detected through gravitational-wave emission, GW170817. Our …

We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder
specifically designed for large photometric surveys. The updated algorithm is applied to …

Unlike most extragalactic distance observables, mergers of neutron star and black hole binary
systems are absolute distance indicators. Often referred to as “standard sirens,” they emit …

We present details of the construction and characterization of the coaddition of the Sloan
Digital Sky Survey (SDSS) Stripe 82 ugriz imaging data. This survey consists of 275 deg 2 of …

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 matter …

We present and characterize the galaxy shape catalogue from the first 3 yr of Dark Energy
Survey (DES) observations, over an effective area of 4143 deg 2 of the southern sky. We …

A system of 5020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at
Kitt Peak National Observatory. The robots automatically retarget their optical fibers every 10…

We propose in this White Paper a concept for a space experiment using cold atoms to search
for ultra-light dark matter, and to detect gravitational waves in the frequency range between …