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- W2783168156 abstract "Bright gamma-ray burst (GRB) 110731A was simultaneously observed by Fermi and Swift observatories, with a follow up optical observation which inferred the redshift of z = 2.83. Thus, available data are spanning from optical to high energy (GeV) emission. We analyze these data within the induced gravitational collapse (IGC) paradigm, recently introduced to explain temporal coincidence of some long GRBs with type Ic supernovae. The case of binary-driven hypcrnova (BdHN) assumes a close system, which starts as an evolved core - neutron star binary. After the core-collapse event, the new NS - black hole system is formed, emitting the GRB in the process. We performed the time-resolved and time-integrated analysis of the Fermi data . Preliminary results gave isotropic energy E iso = 6.05 × 10 53 erg and the total P-GRB energy of E p–GRB = 3.7 × 10 52 erg. At transparency point we found a Lorentz factor Γ ~ 2.17 × 10 3 laboratory radius of 8.33 x 10 13 cm, P-GRB observed temperature of 168 keV and a baryon load B = 4.35 × 10 -4 . Simulated light-curve and prompt emission spectra showed the average circum burst medium density to be n ~ 0.03 particles per cm 3 . We reproduced the X-ray light-curve within the rest-frame of the source, finding the common late power-law behavior, with α = –1.22. Considering these results, we interpret GRB 110731A as a member of a BdHNe group." @default.
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- W2783168156 date "2018-01-01" @default.
- W2783168156 modified "2023-10-16" @default.
- W2783168156 title "GRB 110731A within the IGC paradigm" @default.
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- W2783168156 doi "https://doi.org/10.1051/epjconf/201816804008" @default.
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