The GRB of 1999 January 23: Prompt emission and broad-band afterglow modeling

Corsi, A. and Piro, L. and Kuulkers, E. and Amati, L. and Antonelli, L. A. and Costa, E. and Feroci, M. and Frontera, F. and Guidorzi, C. and Heise, J. and in't Zand, J. and Maiorano, E. and Montanari, E. and Nicastro, L. and Pian, E. and Soffitta, P. (2005) The GRB of 1999 January 23: Prompt emission and broad-band afterglow modeling. Il nuovo cimento C, 28 (4\5). pp. 493-496. ISSN 1826-9885

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Were port on BeppoSAX simultaneous X- and γ-ray observations of the bright γ-ray burst (GRB) 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and γ-rays, confirming the suggestion that the emission mechanisms at low and high frequencies must have different physical origins. We discuss the X-ray afterglow observed by the Narrow Field Instruments (NFIs) on board BeppoSAX and its hard–X-ray emission up to 60 keV several hours after the burst, in the framework of the standard fireball model. The effects of including an important contribution of inverse Compton scattering or modifying the hydrodynamics are studied.

Item Type: Article
Additional Information: Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004.
Uncontrolled Keywords: Spectroscopy and spectrophotometry ; X-ray ; γ-ray sources; γ-ray bursts
Subjects: 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse
Depositing User: Marina Spanti
Date Deposited: 16 Mar 2020 16:47
Last Modified: 16 Mar 2020 16:47

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