Halo during the beginning of the supernovae burst phase (5.3 Myr after the formation of the DCBH). Top row: Integral of density-weighted mean density (left), density-weighted mean temperature (middle), and density-weighted mean metallicity (right). Bottom row: Integrated total emission (left), scattering per unit area (middle), and ionized hydrogen fraction (right). The location of the DCBH is shown as a black circle in the top right plot. The first supernovae after the star-formation burst are seen heating the CGM 4 Myr after the insertion of the DCBH.