Abstract Details
| Name: Sujay Mate Affiliation: IISER Pune Conference ID: ASI2017_1043 Title : AstroSAT Mass Model and Transient Detection with CZTI Authors and Co-Authors : Tanmoy Chattopadhyay, PRL Ahmedabad; Varun Bhalerao, IUCAA Pune; Dipankar Bhattacharya, IUCAA Pune; A. R. Rao, TIFR Mumbai; H. M. Antia, TIFR Mumbai; Krishnan Kutty, TIFR Mumbai; Harshit Shah, TIFR Mumbai; Santosh Vadawale, PRL Ahmedabad; Nagabhushana. S, IIA Bangalore Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : We report on a detailed mass model of AstroSat created to study off-axis transients detected by CZTI. Cadmium Zinc Telluride Imager (CZTI) is a hard X-ray detector on board of AstroSAT with capability of acting as an all sky monitor at high energies (typically > 60 keV). CZTI has detected over 80 transients from all parts of the sky. Localisation as well as estimation of detector response of such detections is a challenge as both are affected by the scattering of photons caused by other instruments on satellite, satellite body and the CZTI detector elements. We have created a detailed satellite mass model in GEANT4 to calculate the CZTI-observed counts and spectra for such off-axis transients. In the mass model, the CZTI geometry is built with high accuracy while other instruments and structures are built with reasonable approximations. By using this mass model we have simulated response of GRBs in GEANT4. Same mass model is used to calculate all-sky response to localise transient sources including X-ray counterparts to gravitational wave detections. |