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GRB030329 Afterglow: Constraining the Double Jet Model

By L. Resmi, C. H. Ishwara-ch, A. J. Castro-tirado, D. Bhattacharya, G. C. Anupama, A. Subramaniam, A. Lundgren, J. Gorosabel, S. Guziy, A. De Ugarte Postigo, J. M. Castro Cerón and T. Wiklind


Abstract. We present radio, millimeter and optical observations of the afterglow of GRB030329. UBV RCIC photometry is presented for a period of 3 hours to 34 days after the burst. Radio monitoring at 1280 MHz has been carried out2 L. Resmi et al.: Radio, Millimeter and Optical Afterglow of GRB030329 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”

Year: 2005
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