Structure of the Prompt Emission of GRB 151027A Within the Fireshell Model


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Long gamma-ray burst GRB 151027A was observed by all three detectors onboard the Swift spacecraft, and many more, including MAXI, Konus-Wind and Fermi GBM/LAT instruments. This revealed a complex structure of the prompt and afterglow emission, consisting of a double-peak gammaray prompt with a quiescent period and a HRF/SXF within the X-ray afterglow, together with multiple BB components seen within the time-resolved spectral analysis. These features, within the fireshell model, are interpreted as the manifestation of the same physical process viewed at different angles with respect to the HN ejecta. Here we present the time-resolved and time-integrated spectral analysis used to determine the energy of the ee+ plasma Etot and the baryon load B. These quantities describe the dynamics of the fireshell up to the transparency point. We proceed with the light-curve simulation from which CBM density values and its inhomogeneities are deduced. We also investigate the properties of GRB 140206A, whose prompt emission exhibits a similar structure.

Sobre autores

D. Primorac

ICRANet; ICRA and University of Rome “Sapienza”

Autor responsável pela correspondência
Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

M. Muccino

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

R. Moradi

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

Y. Wang

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

J. Melon Fuksman

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

R. Ruffini

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

C. Bianco

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

J. Rueda

ICRANet; ICRA and University of Rome “Sapienza”

Email: daracparacldv@hotmail.com
Itália, Pescara; Rome

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