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Discovery of the short gamma-ray burst GRB 050709
J. S. Villasenor, D. Q. Lamb, G. R. Ricker +30
Gamma-Ray Bursts (GRBs) fall into two classes: short-hard and long-soft bursts. The latter are now known to have X-ray and optical afterglows, to occur at cosmological distances in…
FAVOR (FAst Variability Optical Registration) -- A Two-telescope Complex for Detection and Investigation of Short Optical Transients
G. Beskin, V. Bad'in, A. Biryukov +25
An astronomical complex intended to detect optical transients (OTs) in a wide field and follow them up with high time resolution investigation is described.
Early re-brightening of the afterglow of GRB 050525a
A. Klotz, M. Boer, J. L. Atteia +4
We present time resolved optical data acquired by the TAROT automated observatory on the afterglow of GRB 050525a from 6 to 136 minutes after the GRB. We evidence a rapid re-bright…
project: III. Gas mass fraction shape in high redshift clusters
Rachida Sadat, Alain Blanchard, Sebastien C. Vauclair +10
We study the gas mass fraction, behavior in project. The typical shape of high redshift galaxy clusters follows the global shape inf…
HETE-2 Observation of two gamma-ray bursts at z > 3
J. -L. Atteia, N. Kawai, R. Vanderspek +36
GRB 020124 and GRB 030323 constitute half the sample of gamma-ray bursts with a measured redshift greater than 3. This paper presents the temporal and spectral properties of these…