Abstract Details
| Name: Arvind Balasubramanian Affiliation: IISER Pune Conference ID: ASI2018_1679 Title : Calculating the CZTI all-sky sensitivity to transients Authors and Co-Authors : A. Balasubramanian, S. Mate, V. Bhalerao (IITB), N. P. S. Mithun, E. Aarthy, S. Vadawale (PRL), D. Bhattacharya (IUCAA), A. R. Rao (TIFR) Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : The Cadmium Zinc Telluride Imager (CZTI) is a hard x-ray coded aperture mask telescope onboard the AstroSAT, sensitive in 20 - 200 keV range. For photons above 100keV, it acts as an open sky detector and can detect transients like Gamma Ray Bursts (GRBs), and the X-ray counterparts to gravitational wave sources, from the entire sky. The spectral response and overall sensitivity of CZTI depend on the direction of the source. To characterise this direction dependance of sensitivity, we have developed a detailed software simulation (called the mass model) of AstroSat. This mass model can be used to calculate the response for any source, shining from any direction in the sky. We can also use the simulation outputs to localise any new transient sources on the sky. For transients with a known position, we can simulate the satellite spectral response to calculate the source spectrum from the detected photons. We present details of the mass model, and a few scientific results derived from its application. |