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Spectroscopy of GRB 051111 at z=1.54948: Kinematics and Elemental Abundances of the GRB Environment and Host Galaxy
B. E. Penprase, E. Berger, D. B. Fox +8
We present a high-resolution, high signal-to-noise optical spectrum of the afterglow of GRB 051111 obtained with the HIRES spectrograph on the Keck I 10-m telescope. The spectrum e…
Fine-Structure FeII and SiII Absorption in the Spectrum of GRB 051111: Implications for the Burst Environment
E. Berger, B. E. Penprase, D. B. Fox +4
We present an analysis of fine-structure transitions of FeII and SiII detected in a high-resolution optical spectrum of the afterglow of GRB 051111 (z=1.54948). The fine-structure…
Spectroscopy of GRB 050505 at z=4.275: A logN(HI)=22.1 DLA Host Galaxy and the Nature of the Progenitor
E. Berger, B. E. Penprase, S. B. Cenko +4
We present the discovery of the optical afterglow of GRB 050505 and an optical absorption spectrum obtained with the Keck I 10-m telescope. The spectrum exhibits three redshifted a…
The afterglow of GRB050709 and the nature of the short-hard gamma-ray bursts
D. B. Fox, D. A. Frail, P. A. Price +33
The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class, suspected on theoretical grounds to result from the coa…
The Progenitors of Short-Hard Gamma-Ray Bursts from an Extended Sample of Events
Avishay Gal-Yam, Ehud Nakar, Eran Ofek +11
The detection of the afterglow emission and host galaxies of short-hard gamma-ray bursts (SHBs) is one of the most exciting recent astronomical discoveries. Indications that SHB pr…
A Morphological Study of Gamma-Ray Burst Host Galaxies
C. Wainwright, E. Berger, B. E. Penprase
We present a comprehensive study of the morphological properties of 42 gamma-ray burst (GRB) host galaxies imaged with the Hubble Space Telescope in the optical band. The purpose o…