Possible detection of hard X-ray afterglows of short γ-ray bursts
نویسندگان
چکیده
منابع مشابه
Possible detection of hard X-ray afterglows of short γ-ray bursts
We report the discovery of a transient and fading hard X-ray emission in the BATSE lightcurves of a sample of short γ-ray bursts. We have summed each of the four channel BATSE light curves of 76 short bursts to uncover the average overall temporal and spectral evolution of a possible transient signal following the prompt flux. We found an excess emission peaking ∼ 30 s after the prompt one, det...
متن کاملHard X-ray afterglows of short GRBs
We report the discovery of a transient and fading hard X-ray emission in the BATSE lightcurves of a sample of short γ-ray bursts. We have summed each of the four channel BATSE light curves of 76 short bursts to uncover the average overall temporal and spectral evolution of a possible transient signal following the prompt flux. We found an excess emission peaking ∼ 30 s after the prompt one, det...
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The afterglow emission has become the main stream of Gamma-Ray burst research since its discovery three years ago. With the distance-scale enigma solved, the study of the late-time GRB emission is now the most promising approach to disclose the origin of these explosions and their relationship with the environment of the host galaxy in the early phase of the Universe. In this contribution I wil...
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We consider possible interpretations of the recently detected X-ray afterglow from the gamma-ray burst source GRB 970228. Cosmological and Galactic models of gamma-ray bursts predict different flux and spectral evolution of X-ray afterglows. We show that models based on adiabatic expansion of relativistic forward shocks require very efficient particle energization or post-burst re-acceleration ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2001
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20011485