Automated Redshift estimation from X-ray AGN spectra: Obtaining Representative AGN Spectral Shapes from nearby AGN

Spectroscopic redshift extraction is an expensive process. In this work, we have tried to extract redshift information solely from the X-ray AGN spectra by employing an automated method. For this purpose, we have used highly quality NuSTAR hard X-ray spectra to obtain a set of models that best represent the X-ray spectral shape of AGN. We have used UXCLUMPY, a relatively new clumpy torus model that allows for self-consistent multi-wavelength analyses. The models were then used to simulate spectra with Athena WFI response matrices in the redshift range of 1 - 4, 10^44-45 erg/s Luminosity LX (2−10keV) range, and exposure time of 1 Ms. These simulated spectra were then passed on to a classical automated redshift estimating algorithm to recover the redshifts. Our preliminary results show that redshifts can be recovered within 5% for upto 50% of the sample simulations.