GRB060607A is a very distant (z=3.082) and energetic event (E iso∼1053erg). Its main peculiarity is that the peak of the near-infrared afterglow has been observed with the REM robotic telescope, allowing to infer the initial Lorentz gamma factor of the emitting system. We present a preliminary analysis of the spectra and light curves of GRB060607A prompt emission within the fireshell model. We show that the N(E) spectrum of the prompt emission, whose behavior is usually described as "simple power-law," can also be fitted in a satisfactory way by a convolution of thermal spectra as predicted by the model we applied. The theoretical time-integrated spectrum of the prompt emission as well as the light curves in the BAT and XRT energy band are in good agreement with the observations, enforcing the plausibility of our approach. Furthermore, the initial value of Lorentz gamma factor we predict is compatible with the one deduced from the REM observations. © 2008 American Institute of Physics.
Preliminary analysis of GRB060607A within the fireshell model / Bernardini, M. G.; Bianco, Carlo Luciano; Caito, L.; Dainotti, M. G.; Guida, R. R.; Ruffini, Remo. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - 1065:(2008), pp. 227-230. (Intervento presentato al convegno 2008 Nanjing Gamma-Ray Burst Conference tenutosi a Nanjing; China nel 23-27 July 2008) [10.1063/1.3027917].
Preliminary analysis of GRB060607A within the fireshell model
BIANCO, Carlo Luciano;RUFFINI, Remo
2008
Abstract
GRB060607A is a very distant (z=3.082) and energetic event (E iso∼1053erg). Its main peculiarity is that the peak of the near-infrared afterglow has been observed with the REM robotic telescope, allowing to infer the initial Lorentz gamma factor of the emitting system. We present a preliminary analysis of the spectra and light curves of GRB060607A prompt emission within the fireshell model. We show that the N(E) spectrum of the prompt emission, whose behavior is usually described as "simple power-law," can also be fitted in a satisfactory way by a convolution of thermal spectra as predicted by the model we applied. The theoretical time-integrated spectrum of the prompt emission as well as the light curves in the BAT and XRT energy band are in good agreement with the observations, enforcing the plausibility of our approach. Furthermore, the initial value of Lorentz gamma factor we predict is compatible with the one deduced from the REM observations. © 2008 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
