Observations show that at least some gamma-ray bursts (GRBs) happen simultaneously
with core-collapse supernovae (SNe), thus linking by a common thread nature's two …

We present a sample of 77 optical afterglows (OAs) of Swift detected gamma-ray bursts
(GRBs) for which spectroscopic follow-up observations have been secured. Our first …

The gamma-ray burst (GRB) 050904 at provides the first opportunity to probe the
intergalactic medium (IGM) by GRBs at the epoch of reionization. Here, we present a …

We discuss accurate metallicity measurements for 125 damped Ly α (DLA) systems at 0.5<
z< 5, including≈ 50 new measurements from our recently published Echellette …

The evolution of cosmic dust content and the cycle between metals and dust in the
interstellar medium (ISM) play a fundamental role in galaxy evolution. The chemical …

We present the results of a systematic analysis of gamma-ray burst afterglow spectral energy
distributions (SEDs) in the optical/near-infrared bands. Our input list includes the entire …

Context. The afterglows and host galaxies of long gamma-ray bursts (GRBs) offer unique
opportunities to study star-forming galaxies in the high-z Universe. Until recently, however …

We study the chemical abundances of the interstellar medium surrounding high-z gamma-
ray bursts (GRBs) through analysis of the damped Lyα systems (DLAs) identified in afterglow …

The chemical enrichment of dust and metals in the interstellar medium of galaxies
throughout cosmic time is one of the key driving processes of galaxy evolution. Here we …

THE FIRST POSITIVE DETECTION OF MOLECULAR GAS IN A GRB HOST GALAXY -
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