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A Redshift Determination for XRF 020903: First Spectroscopic Observations of an X-Ray Flash
A. M. Soderberg, S. R. Kulkarni, E. Berger +10
We report the discovery of optical and radio afterglow emission from the extremely soft X-ray flash, XRF 020903. Our spectroscopic observations provide the first redshift for an X-…
A Late-Time Flattening of Afterglow Light Curves
D. A. Frail, B. D. Metzger, E. Berger +2
We present a sample of radio afterglow light curves with measured decay slopes which show evidence for a flattening at late times compared to optical and X-ray decay indices. The s…
A Common Origin for Cosmic Explosions Inferred from Fireball Calorimetry
E. Berger, S. R. Kulkarni, G. Pooley +8
Past studies suggest that long-duration gamma-ray bursts (GRBs) have a standard energy of E_gamma ~ 10^51 erg in ultra-relativistic ejecta when corrected for asymmetry ("jets"). Ho…
Cosmological Uses of Gamma-Ray Bursts
S. G. Djorgovski, S. R. Kulkarni, D. A. Frail +12
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are starting to provide interesting or even unique new insights in observational cosmology. GRBs represent a n…
Discovery of Early Optical Emission from GRB 021211
D. W. Fox, P. A. Price, A. M. Soderberg +11
We report our discovery and early time optical, near-infrared, and radio wavelength follow-up observations of the afterglow of the gamma-ray burst GRB 021211. Our optical observati…
The Cosmic Gamma-Ray Bursts and Their Host Galaxies in a Cosmological Context
S. G. Djorgovski, S. R. Kulkarni, D. A. Frail +14
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are now starting to provide interesting or even unique new insights in observational cosmology. Observed GRB h…