Back to Search Start Over

THE INTERPLAY OF PROMPT AND AFTERGLOW EMISSION IN GRB 060418.

Authors :
VERGANI, S. D.
MALESANI, D.
MOLINARI, E.
Source :
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology. Sep2008, Vol. 17 Issue 9, p1343-1349. 7p. 1 Chart, 4 Graphs.
Publication Year :
2008

Abstract

We present observations of the early afterglow emission of GRB 060418. Thanks to the simultaneous coverage at optical, X-ray and gamma-ray wavelengths, we can detect and separate the external shock emission (visible in the optical and late X-ray data) and the central engine activity (early X and gamma rays). The two components are clearly distinguished based on temporal and spectral properties. The detection of the afterglow onset (in the optical) allows the determination of the fundamental fireball properties, namely its bulk Lorentz factor and total energy. The early time X-ray flare closely resembles the prompt emission gamma-ray pulses in its temporal profile, being wider at low energies and showing lags between the hard and soft bands. This provides a strong suggestion that X-ray flares are a continuation of the prompt emission. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02182718
Volume :
17
Issue :
9
Database :
Academic Search Index
Journal :
International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology
Publication Type :
Academic Journal
Accession number :
35168106
Full Text :
https://doi.org/10.1142/S0218271808012899