I am currently a Hubble Fellow at Caltech. Most of my work has revolved around the observational study of gamma-ray bursts, their afterglows, and their host galaxies. I have been involved extensively with afterglow follow-up using robotic telescopes (formerly KAIT and PAIRITEL, now with the Palomar 60-inch) as well as with spectroscopy on large-aperture telescopes (Keck and Gemini) of events spanning a redshift range of z=0.01 to z=8.2. Most of my recent work has involved searching for and characterizing the host galaxies in which GRBs have occurred. Since the average redshift of a gamma-ray burst is about z=2.0, this means looking at extremely distant and faint galaxies, observed at a time when the universe was about half its present age and had very different characteristics from today. A common theme of my work involves the GRB-dust connection: probing the properties of high-redshift dust using GRBs, and understanding the selection biases dust absorption imposes on the existing GRB afterglow (and host-galaxy) sample. Some particular research questions I've been interested in:

Select list of publications, with descriptions:



Many additional publications are available via ADS below.
A list is also available in my CV.