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- Centre National de la Recherche ScientifiqueFR101 papers
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5 papers · 2 filters
Probing GRB environments with time variability: ULTRASPEC fast imaging of GRB 080210
A. De Cia, P. Jakobsson, G. Björnsson +12
We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.…
A High Signal-to-Noise Ratio Composite Spectrum of Gamma-ray Burst Afterglows
L. Christensen, J. P. U. Fynbo, J. X. Prochaska +3
We present a composite spectrum of 60 long duration gamma-ray burst (GRB) afterglows with redshifts in the range 0.35<z<6.7 observed with low resolution optical spectra. The compos…
Searching for differences in Swift's intermediate GRBs
A. de Ugarte Postigo, I. Horváth, P. Veres +16
Gamma-ray bursts are usually classified through their high-energy emission into short-duration and long-duration bursts, which presumably reflect two different types of progenitors…
GRB 090417B and its Host Galaxy: A Step Towards an Understanding of Optically-Dark Gamma-Ray Bursts
Stephen T. Holland, Boris Sbarufatti, Rongfeng Shen +10
GRB 090417B was an unusually long burst with a T_90 duration of at least 2130 s and a multi-peaked light curve at energies of 15-150 keV. It was optically dark and has been associa…
Discovery of the nearby long, soft GRB 100316D with an associated supernova
R. L. C. Starling, K. Wiersema, A. J. Levan +43
We report the Swift discovery of nearby long, soft gamma-ray burst GRB 100316D, and the subsequent unveiling of its low redshift host galaxy and associated supernova. We derive the…