Millimeter Observations of GRB 030329: Continued Evidence for a Two-Component Jet
Creators
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1.
California Institute of Technology
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2.
National Radio Astronomy Observatory
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3.
University of Maryland, College Park
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4.
Max Planck Institute for Radio Astronomy
Abstract
We present the results of a dedicated campaign on the afterglow of GRB 030329 with the millimeter interferometers of the Owens Valley Radio Observatory (OVRO) and the Berkeley-Illinois-Maryland Association (BIMA), and with the MAMBO-2 bolometer array on the IRAM 30 m telescope. These observations allow us to trace the full evolution of the afterglow of GRB 030329 at frequencies of 100 and 250 GHz for the first time. The millimeter light curves exhibit two main features: a bright, constant flux density portion and a steep power-law decline. The absence of bright, short-lived millimeter emission is used to show that the GRB central engine was not actively injecting energy well after the burst. The millimeter data support a model, advocated by Berger et al., of a two-component jetlike outflow in which a narrow-angle jet is responsible for the high-energy emission and early optical afterglow, and a wide-angle jet carrying most of the energy is powering the radio and late optical afterglow emission.
Additional Information
© 2003. The American Astronomical Society. Received 2003 July 3; accepted 2003 August 7; published 2003 August 21. GRB research at Caltech is supported by grants from NASA and the National Science Foundation. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. D. A. F. thanks the Astronomical Institute at the University of Amsterdam for their hospitality during the time when this Letter was written. Research at the OVRO is partially funded by NSF grant AST-9981546 and at BIMA by NSF grant AST-9981289. We acknowledge the support of R. Zylka and A. Weiss in observations with the IRAM 30 m telescope, which is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).Attached Files
Published - pdf
Submitted - 0308188.pdf
Files
0308188.pdf
Additional details
Identifiers
- Eprint ID
- 76151
- Resolver ID
- CaltechAUTHORS:20170408-161356786
Related works
- Describes
- http://arxiv.org/abs/astro-ph/0308188 (URL)
Funding
- NASA
- NSF
- AST-9981546
- NSF
- AST-9981289
- Institut national des sciences de l'Univers (INSU)
- Centre National de la Recherche Scientifique (CNRS)
- Max Planck Gesellschaft
- Instituto Geográfico Nacional (IGN)
Dates
- Created
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2017-07-10Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Division of Geological and Planetary Sciences (GPS) , Physics Department