Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model

Resmi, L and Chandra, Ishwara CH and Tirado, Castro AJ and Bhattacharya, D and Rao, AP and Bremer, M and Pandey, SB and Sahu, DK and Bhatt, BC and Sagar, R and Anupama, GC and Subramaniam, A and Lundgren, A and Gorosabel, J and Guziy, S and Postigo, Ugarte AD and Ceron, Castro JM and Wiklind, T (2005) Radio, millimeter and optical monitoring of GRB 030329 afterglow: constraining the double jet model. In: Astronomy and Astrophysics, 440 (2). pp. 477-485.

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Abstract

We present radio, millimeter and optical observations of the afterglow of GRB 030329. $UBVR_CI_C$ photometry is presented for a period of 3 h to 34 days after the burst. Radio monitoring at 1280 MHz has been carried out using the GMRT for more than a year. Simultaneous millimeter observations at 90 GHz and 230 GHz have been obtained from the Swedish-ESO Submillimeter Telescope (SEST) and the IRAM-PdB interferometer over more than a month following the burst. We use these data to constrain the double jet model proposed by Berger et al. (2003) for this afterglow. We also examine whether instead of the two jets being simultaneously present, the wider jet could result from the initially narrow jet, due to a fresh supply of energy from the central engine after the "jet break".

Item Type:	Journal Article
Publication:	Astronomy and Astrophysics
Publisher:	EDP Sciences S A
Additional Information:	The copyright for this article belongs to EDP Sciences.
Keywords:	Gamma rays:Bursts
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Feb 2007
Last Modified:	19 Sep 2010 04:20
URI:	http://eprints.iisc.ac.in/id/eprint/3691

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