Abstract Details
| Name: S. Vadawale Affiliation: PRL, Ahmedabad Conference ID: ASI2016_1031 Title : Initial results from Astrosat CZTI Abstract Type : Plenary Abstract : The Cadmium Zinc Telluride Imager (CZTI) is a wide-field coded aperture mask instrument on Astrosat, sensitive to photons from 20 keV to over 150 keV. It is primarily designed for simultaneous hard X-ray imaging and spectroscopy of variety of celestial X-ray sources such as, black hole binaries, neutron star binaries, pulsars, AGNs and GRBs. The detector plane of CZTI consists of total 64 CZT detector modules arranged in four identical quadrants. Each detector module has an active area of 16 cm2 and further divided into an array of 16 ? 16 pixels, resulting in total 16384 pixels over entire detector plane. As an added advantage, the fine pixilated nature of the detector plane of CZTI is also helpful in extending useful energy range to ~250 keV as well as to measure polarization in hard X-rays, by identifying the X-ray photons interacting by means of Compton scattering. CZTI was the first scientific payload of Astrosat to be switched on after one week of the launch and was made operational during subsequent week. First phase of the CZTI performance verification observations consisted of deep imaging observations of the standard candle source, the Crab nebula as well as a black hole binary Cygnus X-1. Here I will discuss the in-orbit performance of CZTI and present preliminary results form the performance verification phase observations. |