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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-…
The Early Optical Afterglow of GRB 030418 and Progenitor Mass Loss
E. S. Rykoff, D. A. Smith, P. A. Price +13
The ROTSE-IIIa telescope and the SSO-40 inch telescope, both located at Siding Spring Observatory, imaged the early time afterglow of GRB 030418. In this report we present observat…
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…
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 Broadband Afterglow of GRB980703
D. A. Frail, S. A. Yost, E. Berger +8
We present radio observations of the afterglow of the bright gamma-ray burst GRB980703 made between one day and one year after the burst. These data are combined with published lat…
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…