TY - JOUR
T1 - Thermal and non-thermal emission in gamma-ray bursts
T2 - 8th INTEGRAL Workshop on the Restless Gamma-Ray Universe, INTEGRAL 2010
AU - McGlynn, Sinéad
AU - Ryde, Felix
AU - Lundman, Christoffer
AU - Pe'er, Asaf
PY - 2010
Y1 - 2010
N2 - Photospheric (thermal) emission is inherent to the gamma-ray burst (GRB) "fireball" model. Inclusion of this component in the analysis of the GRB prompt emission explains some of the prompt GRB spectra seen by the Fermi satellite over its entire energy band. The sub-MeV peak corresponds to multi-color black body emission, and the high energy tail results from similar contributions of synchrotron emission, synchrotron self Compton (SSC) and Comptonization of the thermal photons by energetic electrons originating after dissipation of the kinetic energy above the photosphere. We study the connection between the thermal and non-thermal parts of the spectrum, and deduce the values of the free model parameters from the data. We demonstrate our analysis method on GRB 090902B.
AB - Photospheric (thermal) emission is inherent to the gamma-ray burst (GRB) "fireball" model. Inclusion of this component in the analysis of the GRB prompt emission explains some of the prompt GRB spectra seen by the Fermi satellite over its entire energy band. The sub-MeV peak corresponds to multi-color black body emission, and the high energy tail results from similar contributions of synchrotron emission, synchrotron self Compton (SSC) and Comptonization of the thermal photons by energetic electrons originating after dissipation of the kinetic energy above the photosphere. We study the connection between the thermal and non-thermal parts of the spectrum, and deduce the values of the free model parameters from the data. We demonstrate our analysis method on GRB 090902B.
UR - http://www.scopus.com/inward/record.url?scp=84883886547&partnerID=8YFLogxK
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AN - SCOPUS:84883886547
SN - 1824-8039
JO - Proceedings of Science
JF - Proceedings of Science
Y2 - 27 September 2010 through 30 September 2010
ER -