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- W2053337010 abstract "A preliminary, and perhaps the first, study of astrophysical applications of Delbrück scattering in a gamma-ray emitting celestial object like a gamma-ray burst (GRB) has been made. At energies≥100 MeV the elastic scattering of gamma-ray photons off the molecular dust surrounding the GRB site is dominated by Delbrück scattering. Expressions for Delbrück-scattered gamma-ray flux as a function of time has been obtained for a few selected energies by assuming a simple model of GRB. These are compared with Compton-scattered flux. At certain situations, interestingly, the former is found to exceed the latter for the first few milliseconds of the burst. The issue of detectability of Delbrück-scattered gamma-ray echo from the cloud of a GRB is discussed. Although it is observed that the detection of such an echo is not within the capability of the presently operating gamma-ray missions such as Fermi LAT, a rough estimate shows that one can be optimistic that future generation gamma-ray telescopes might be able to see such photons' contribution to the total flux." @default.
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- W2053337010 date "2014-02-01" @default.
- W2053337010 modified "2023-10-16" @default.
- W2053337010 title "Astrophysical applications of Delbrück scattering: Dust scattered gamma radiation from gamma ray bursts" @default.
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- W2053337010 doi "https://doi.org/10.1016/j.radphyschem.2012.12.019" @default.
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