|Authors : ||M.C. Ramadevi1, Vivek Kumar Agrawal1, Debbijoy Bhattacharya2, Ankur Kushwaha1, Rwitika Chatterjee1 + , Radhakrishna V.1, Koushal V.1, Anurag Tyagi1, Kiran1 + XSPECT Team1
1 Space Astronomy Group, U. R. Rao Satellite Centre, Bangalore 560017, India
2 Manipal Centre for Natural Sciences, Centre of Excellence, Manipal Academy of Higher Education, Manipal 576104, India
|Abstract : ||XSPECT is an X-ray Spectrometer and Timing experiment payload on the XpoSat mission to be launched in the immediate future. XSPECT can provide fast timing (~1 msec) and good spectroscopy (<200 eV at 6 keV) of X-ray sources in the soft X-ray energy (0.8 – 12 keV). While the polarimeter (POLIX) on-board XPoSAT will carry out long duration observations of X-ray sources for days to weeks, XSPECT can provide long-term monitoring of spectral state changes in continuum emission, simultaneously.
The niche science cases that can be studied with XSPECT observations are:: (i) Spectral evolution of Black Hole Binaries at best possible time cadence of about few hours, (ii) measuring the spin and mass of the blackholes through continuum and iron line profile fitting and evolution of iron line profile over days of observations, (iii) investigation of physics of class variabilities and spectral transition in the blackhole binaries, (iv) study of emission mechanisms in AGN and temporal variabilities in soft band and (v) evolution of X-ray spectrum (in soft band) in NS-LMXBs, nature of soft thermal component. This presentation will discuss the details of these science cases mentioned here.