B. Penprase

Publications133
h-index30
Citations4,210
Highly Influential Citations487
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Relativistic ejecta from X-ray flash XRF 060218 and the rate of cosmic explosions
TLDR
Radio and X-ray observations of XRF 060218 (associated with supernova SN 2006aj), the second-nearest GRB identified until now, are reported, showing that this event is a hundred times less energetic but ten times more common than cosmological GRBs. Expand
A γ-ray burst at a redshift of z ≈ 8.2
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using… Expand
The afterglow of GRB 050709 and the nature of the short-hard γ-ray bursts
The final chapter in the long-standing mystery of the γ-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the… Expand
The afterglow and elliptical host galaxy of the short γ-ray burst GRB 050724
Despite a rich phenomenology, γ-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness—the long-soft and the short-hard bursts. The discovery of afterglow… Expand
A novel explosive process is required for the γ-ray burst GRB 060614
Over the past decade, our physical understanding of γ-ray bursts (GRBs) has progressed rapidly, thanks to the discovery and observation of their long-lived afterglow emission. Long-duration (≳2 s)… Expand
Observations and Modeling of the Inner Disk Region of T Tauri Stars
We present observations of four T Tauri stars using long baseline infrared interferometry from the Palomar Testbed Interferometer. The target sources, T Tau N, SU Aur, RY Tau, and DR Tau, are all… Expand
Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from… Expand
On the source of the dust extinction in type Ia supernovae and the discovery of anomalously strong Na i absorption
High-dispersion observations of the Na I D λλ5890, 5896 and K I λλ7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 A in the spectra of 32 Type Ia supernovae are used as an… Expand
The Zwicky Transient Facility: System Overview, Performance, and First Results
TLDR
The Zwicky Transient Facility is a new optical time-domain survey that uses the Palomar 48 inch Schmidt telescope, and the ZTF data system at the Infrared Processing and Analysis Center provides near-real-time reduction to identify moving and varying objects. Expand
A New Population of High-Redshift Short-Duration Gamma-Ray Bursts
The redshift distribution of the short-duration gamma-ray bursts (GRBs) is a crucial, but currently fragmentary,… Expand
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