Local count spectra corresponding to the points highlighted by the colored crosses superimposed to the map at the top left panel (RIS map in the energy range 6 − 8 keV). The local spectra obtained by using the maps in Fig. 3 provided by RIS are in solid line, while the ones obtained by using the maps in the same figure but provided by MEM_GE when independently applied at each energy channel are in dashed line.