منابع مشابه
Swift observations of the prompt X - ray emission and afterglow from GRB 050126 & GRB 050219 A
We report on the temporal and spectral characteristics of the early X-ray emission from the Gamma Ray Bursts GRB050126 and GRB050219A as observed by Swift. The X-ray light-curves of these 2 bursts both show remarkably steep early decays (F(t) ∝ t−3), breaking to flatter slopes on timescales of a few hundred seconds. For GRB050126 the burst shows no evidence of spectral evolution in the 20-150 k...
متن کاملPrompt Ultraviolet-to-soft X-ray Emission of Gamma-ray Bursts: Application to Grb 031203?
We discuss the prompt emission of GRBs, allowing for γγ pair production and synchrotron self-absorption. The observed hard spectra suggest heavy pair-loading in GRBs. The re-emission of the generated pairs results in the energy transmission from high-energy gamma-rays to long-wavelength radiation. Due to strong self-absorption, the synchrotron radiation by pairs is in optically thick regime. Th...
متن کاملGRB 060714: No Clear Dividing Line Between Prompt Emission and X-ray Flares
The long gamma-ray burst GRB 060714 was observed to exhibit a series of five X-ray flares beginning ∼ 70 s after the burst trigger T0 and continuing until ∼ T0 + 200 s. The first two flares were detected by the Burst Alert Telescope (BAT) on the Swift satellite, before Swift had slewed to the burst location, while the last three flares were strongly detected by the X-Ray Telescope (XRT) but onl...
متن کاملPrompt and afterglow emission from the X - ray rich GRB 981226 observed with
We discuss observations of the prompt X– and γ–ray emission and X–ray afterglow from GRB981226. This event has the weakest gamma-ray peak flux detected with the BeppoSAX Gamma-Ray Burst Monitor. It shows an isolated X-ray precursor and the highest X-ray to gamma-ray fluence ratio measured thus far with the BeppoSAX Wide Field Cameras. The event was followed up with the BeppoSAX Narrow Field Ins...
متن کاملThe circumburst environment of a FRED GRB : study of the prompt emission and X - ray / optical afterglow of GRB 051111
Aims. We report a multi-wavelength analysis of the prompt emission and early afterglow of GRB 051111 and discuss its properties in the context of current fireball models. Methods. The detection of GRB 051111 by the Burst Alert Telescope on-board Swift triggered early BVRi' observations with the 2-m robotic Faulkes Telescope North in Hawaii, as well as X-ray observations with the Swift X-Ray Tel...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2011
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312012665