5 papers · 1 filter
Synchrotron self-Compton Reverse Shock in Energy-Injection and Radiative Scenarios
Fraija Nissim, Betancourt-Kamenetskaia Boris, Galván Antonio +1
Gamma-ray bursts (GRBs) are among the most energetic extragalactic transients, providing a unique laboratory to investigate the physical origin of the diverse morphologies observed…
Deep Newtonian Afterglows: Theoretical Light Curves for Quasi-spherical Outflows
Nissim Fraija, Boris Betancourt-Kamenetskaia, Antonio Galván +1
We investigate late-time gamma-ray burst (GRB) afterglows produced by quasi-spherical outflows propagating into a stratified circumburst medium during the deep Newtonian phase. Sub…
GRB~250704B/EP250704a a Short Gamma-Ray Burst Powered by a Magnetar
Nissim Fraija, Antonio Galván, Boris Betancourt Kamenetskaia +1
GRB~250704B/EP250704a, identified as a short gamma-ray burst (sGRB), exhibited prolonged X-ray emission following the prompt phase and, in optical and infrared (IR) bands, an unusu…
Variation of Microphysical Parameters in Reverse-shock Scenario
Nissim Fraija, Boris Betancourt-Kamenetskaia, Antonio Galván +1
Gamma-ray bursts (GRBs), among the most compelling astrophysical phenomena, are potential candidates for exploring the evolution of energy distribution among magnetic fields and pa…
The unprecedented flaring activities around Mrk 421 in 2012 and 2013: The test for neutrino and UHECR event connection
Nissim Fraija, Edilberto Aguilar-Ruiz, Antonio Galván +2
Since its mission, Fermi Collaboration reported the highest flux observed during July - September 2012 for the BL Lac Markarian 421 (Mrk 421). The integrated flux was eight times g…