| Name: | Shraddha Mohnani |
| Affiliation: | Indian Institute of Technology Indore |
| Conference ID : | ASI2024_621 |
| Title : | Modelling the multi-wavelength afterglow lightcurves of Gamma Ray Bursts |
| Authors : | Shraddha Mohnani1, Swarna Chatterjee1, Biswajit Banerjee2 , Amit Shukla1, Abhirup Datta1, Gor Oganesyan2 |
| Authors Affiliation: | 1 Indian Institute of Technology Indore, Indore - 453552, India
2 Gran Sasso Science Institute , L'Aquila - 67100, Italy |
| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | Gamma Ray Bursts (GRBs) are the most energetic explosions in the universe, giving rise to highly collimated ultra-relativistic jets. However, the structure of GRB jets and their launching mechanisms are not entirely understood yet. Characterizing jet structure is essential as it governs the observational imprint of the jet from the prompt emission to the afterglow. To explore the structural intricacies of GRB jets and their evolution, one of the most effective approaches is to model the afterglow light curves across a sample of on-axis and off-axis GRBs. In our present study, we undertake the modelling of GRB afterglow light curves and perform a comprehensive multiwavelength analysis of a remarkably bright burst, GRB 230812B, which was recently detected by the Gamma-Ray Burst Monitor aboard the Fermi Space Telescope. We have conducted low-frequency radio observations of the burst through the upgraded Giant Metrewave Radio telescope and obtained the flux upper limits as the GRB is in the synchrotron self-absorption regime. We will be discussing our results from the multiwavelength analysis, including Fermi-GBM, Fermi-LAT, Swift XRT, uGMRT, and optical observations from other telescopes. Additionally, we will discuss the afterglow models accounting for different jet structures for this GRB to provide insights into the potential constraints on microphysical parameters that govern the interaction between the GRB jet and the surrounding medium.
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