About this science case

High-energy polarimetry (from X-rays to gamma-rays) opens up a new window to the universe, providing new a diagnostic for the study of a vast variaty of astrophysical objects. The Imaging X-ray polarimetry Explorer (IXPE) is greatly advancing our understanding of X-ray binaries and active galactic nuclei, among other objects. The future Compton Spectrometer and Imager (COSI) will provide polarization observation in the MeV band for GRB and other steady sources with interesting overlap with IXPE science.