Compton tails in long-duration gamma-ray bursts

Details Compton tails in long-duration gamma-ray bursts Compton tails in long-duration gamma-ray bursts

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.350l...5b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 350, Issue 1, pp. L5-L8.

Astronomy and Astrophysics

Astronomy

6

Gamma-Rays: Bursts, X-Rays: General

Scientific paper

Some of the phenomena related to the prompt gamma-ray burst emission could be interpreted as the presence of a consistent amount of material (Thomson optical depth ~1) at rest and close to the source at a typical distance of ~1015 cm. The material optical depth τ=σΔR, where is the average particle density over the distance ΔR, will attenuate the prompt gamma-ray flux by an amount e-τ, while producing a secondary flux proportional to 1 - e-τ of scattered photons with a partly modified energy spectrum. This emission should be delayed with respect to the prompt gamma-ray emission by a time-scale which is directly related to the burst opening angle (θj) and to the scattering material space distribution (ΔR).

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