| Name: | Divita Saraogi |
| Affiliation: | IIT Bombay |
| Conference ID : | ASI2023_564 |
| Title : | How robust are polarisation measurements to GRB location? |
| Authors : | Divita Saraogi, Soumya Gupta, Suman Bala, Tanmoy Chattopadhyay, Varun Bhalerao, Dipankar Bhattacharya, Santosh Vadawale |
| Mode of Presentation: | Oral |
| Abstract Category : | Extragalactic Astronomy |
| Abstract : | Measurements of the polarisation of Gamma Ray Bursts (GRBs) are extremely important for understanding the emission mechanisms, the jet magnetic field, nature and activity of the central engine, etc. The Cadmium Zinc Telluride Imager (CZTI) on board AstroSat has made great strides in the measurement of GRB polarisation. Polarisation measurements utilise a direction-dependent response of the satellite from the satellite mass model. However, not all GRBs are localised well, and the source location can be uncertain by a few degrees. We investigate the impact of these localisation uncertainties on the polarisation measurements by AstroSat. I will demonstrate the effect with specific examples of GRBs, and discuss the implications of this study. |
