NXB subtracted spectra in each annular region. The XIS BI (Black) and FI (Red) spectra are fitted with the ICM model (phabs × apec), along with the sum of the CXB and the Galactic emission of Case 2 (apec + phabs(apec + apec + powerlaw)). The ICM component is shown with a magenta line. The CXB component is shown with a black curve, and the LHB, MWH, and HF emissions are indicated with green, blue and gray curves, respectively. The sum of all sky background components is shown with the orange curve. The left panel shows the spectrum of the outside region. The right panel shows the inside region.