Gamma-ray bursts (GRBs) are divided into two populations,; long GRBs that derive from the
core collapse of massive stars (for example, ref.) and short GRBs that form in the merger of …

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 …

The mass–luminosity relation for late-type stars has long been a critical tool for estimating
stellar masses. However, there is growing need for both a higher-precision relation and a …

Two new imaging instruments,'Alopeke and Zorro, were designed, built, and commissioned
at the Gemini-North and Gemini-South telescopes in 2018 and 2019, respectively. Here we …

Strong gravitational lens systems with time delays between the multiple images allow
measurements of time-delay distances, which are primarily sensitive to the Hubble constant …

We combine optical, near-infrared, and mid-infrared spectra and photometry to construct
expanded spectral energy distributions for 145 field age (> 500 Myr) and 53 young (lower …

We report on work to increase the number of well-measured Type Ia supernovae (SNe Ia) at
high redshifts. Light curves, including high signal-to-noise Hubble Space Telescope data …

Observations of circumstellar environments that look for the direct signal of exoplanets and
the scattered light from disks have significant instrumental implications. In the past 15 years …

As brown dwarfs cool, a variety of species condense in their atmospheres, forming clouds.
Iron and silicate clouds shape the emergent spectra of L dwarfs, but these clouds dissipate …

We present exoplanet occurrence rates estimated with approximate Bayesian computation
for planets with radii between 0.5 and 16 R⊕ and orbital periods between 0.78 and 400 …