Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...459l..79c&link_type=abstract
Astrophysical Journal Letters v.459, p.L79
Astronomy and Astrophysics
Astronomy
23
Gamma Rays: Bursts, Infrared: General
Scientific paper
We show that the electromagnetic cascade of very high energy gamma-rays from gamma-ray bursts in the IR/microwave background will produce delayed MeV--GeV photons. Monte Carlo simulations have been performed to study this process. The distance of GB 940217 is estimated to be not less than 120 Mpc using our model, which supports a cosmological origin for this source. We also show that the time delays of gamma-ray photons are inversely proportional to their energy. Our model does not require the presence of intergalactic magnetic fields.
Cheng Kwong Sang
Cheng Ling-Xiang
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