Investigating Polarization characteristics of GRB200503A and GRB201009A
Divita Saraogi, Suman Bala, Jitendra Joshi, Shabnam Iyyani, Varun, Bhalerao, J Venkata Aditya, D.S. Svinkin, D.D. Frederiks, A.L. Lysenko, A.V., Ridnaia, A.S.Kozyrev, D.V. Golovin, I.G. Mitrofanov, M.L. Litvak, A.B. Sanin,, Tanmoy Chattopadyay, Soumya Gupta, Gaurav Waratkar
TL;DR
This paper analyzes the polarization characteristics of two gamma-ray bursts, GRB 200503A and GRB 201009A, using AstroSat's CZTI instrument, revealing high polarization in one of them despite localization challenges.
Contribution
It introduces a new localization pipeline for GRBs and provides polarization analysis results for these bursts, with a novel focus on previously unlocalized events.
Findings
GRB 201009A exhibits a high degree of polarization.
Localization pipeline successfully identified burst positions.
Polarization analysis was limited for GRB 200503A.
Abstract
We present results of a comprehensive analysis of the polarization characteristics of GRB 200503A and GRB 201009A observed with the Cadmium Zinc Telluride Imager (CZTI) on board AstroSat. Despite these GRBs being reasonably bright, they were missed by several spacecraft and had thus far not been localized well, hindering polarization analysis. We present positions of these bursts obtained from the Inter-Planetary Network (IPN) and the newly developed CZTI localization pipeline. We then undertook polarization analyses using the standard CZTI pipeline. We cannot constrain the polarization properties for GRB 200503A, but find that GRB 201009A has a high degree of polarization.
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Taxonomy
TopicsGamma-ray bursts and supernovae