Constraints on the late X-ray emission from the low-energy GRB 031203: INTEGRAL data

Details Constraints on the late X-ray emission from the low-energy GRB 031203: INTEGRAL data Constraints on the late X-ray emission from the low-energy GRB 031203: INTEGRAL data

2006-05-19

arxiv.org/abs/astro-ph/0605494v1

Astron.Lett.32:297-301,2006

Astronomy and Astrophysics

Astrophysics

9 pages, 3 figures

Scientific paper

10.1134/S1063773706050021

Comparison of the INTEGRAL upper limits on the hard X-ray flux before and after the low-energy GRB 031203 with the XMM measurements of the dust-scattered radiation at lower energies suggests that a significant fraction of the total burst energy could be released in the form of soft X-rays at an early afterglow stage with a characteristic duration of ~100-1000s. The overall time evolution of the GRB 031203 afterglow may have not differed qualitatively from the behavior of standard (i.e., more intense) bursts studied by the SWIFT observatory. The available data also admit the possibility that the dust-scattered radiation was associated with an additional soft component in the spectrum of the gamma-ray burst itself.

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