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Five Years of Multi-frequency Monitoring of GRB030329 Afterglow Using the GMRT and WSRT.
- Source :
-
AIP Conference Proceedings . 5/25/2009, Vol. 1133 Issue 1, p169-174. 6p. 1 Graph. - Publication Year :
- 2009
-
Abstract
- GRB 030329 displayed one of the brightest optical afterglows ever. We have followed the radio afterglow of GRB 030329 for over 5 years using the GMRT and WSRT at low radio frequencies. This is the longest as well as the lowest frequency follow up of any GRB afterglow ever. Radio observations of a GRB afterglow provide a unique probe of the physics of the blast wave at late times, when the expansion of the fireball slows down to non-relativistic speeds. Our GMRT-WSRT observations suggest that the afterglow of GRB030329 entered the non-relativistic phase around 60 days after the burst. The estimate of the fireball energy content, ∼1051 erg, in this near-isotropic phase is much less susceptible to the collimation-related uncertainties arising in the relativistic phase. We have also been closely monitoring the evolution of the afterglow to look for possible signatures of emission from a counter jet, but no conclusive evidence has so far been found. [ABSTRACT FROM AUTHOR]
- Subjects :
- *AFTERGLOW (Physics)
*RADIO frequency
*GAMMA ray bursts
*LUMINESCENCE
*PHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1133
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 41139329
- Full Text :
- https://doi.org/10.1063/1.3155871