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INTEGRAL observation of the X-ray burster KS 1741-293
G. De Cesare, A. Bazzano, G. Stratta +3
KS 1741-293 was firstly detected in 1989 with the X-ray wide field camera TTM (3-10 keV) on board of the Rontgen-Kvant-Mir observatory. During these observations this source exhibi…
GRB environment properties through X and optical afterglow observations
M. L Conciatore, L. A. Antonelli, G. Stratta +2
We present the spectral analysis of 14 gamma-ray bursts (GRB) X-ray afterglows in order to investigate the properties of interstellar matter (ISM) along the line of sight of GRB. W…
Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405
G. Stratta, R. Perna, D. Lazzati +3
We present an optical-to-X-ray spectral analysis of the afterglow of GRB 020405. The optical spectral energy distribution not corrected for the extragalactic extinction is signific…
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…