The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999

Galama, T.J., Briggs, M.S., Wijers, Ramj, Vreeswijk, P.M., Rol, E., Band, D., van Paradijs, J., Kouveliotou, C., Preece, R.D., Bremer, M., and others. (1999) The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999. Nature, 398 (6726). pp. 394-399. ISSN 0028-0836. (doi:10.1038/18828) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:16790)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL: http://dx.doi.org/10.1038/18828

Abstract

Gamma-ray bursts (GRBs) are thought to arise when an extremely relativistic outflow of particles from a massive explosion (the nature of which is still unclear) Interacts with material surrounding the site of the explosion. observations of the evolving changes in emission at many wavelengths allow us to Investigate the origin of the photons, and so potentially determine the nature of the explosion. Here we report the results of gamma-ray, optical, Infrared, submillimetre, millimetre and radio observations of the burst GRB990123 and Its afterglow. Our Interpretation of the data Indicates that the initial and afterglow emissions are associated with three distinct regions In the fireball. The peak flux of the afterglow, one day after the burst, has a lower frequency than observed for other bursts; this explains tbe short-lived radio emission. We suggest that the differences between bursts reflect variations In the magnetic-field strength in the afterglow-emitting regions.

Item Type:	Article
DOI/Identification number:	10.1038/18828
Subjects:	Q Science
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	I.T. Ekpo
Date Deposited:	02 May 2009 18:26 UTC
Last Modified:	05 Nov 2024 09:52 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/16790 (The current URI for this page, for reference purposes)

University of Kent Author Information

Robinson, Colin.

Creator's ORCID:	https://orcid.org/0000-0002-1739-032X
CReDIT Contributor Roles:

Green, Simon F..

Creator's ORCID:	https://orcid.org/0000-0002-9153-9786
CReDIT Contributor Roles:

Foster, Michael J..

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