def combined_mask_region_index_map(self): #return fits.open(self.region_to_index)[0].data return io.get_pixel_values(self.region_to_index)
def cropped_nosrc_xray_surface_brightness(self): return io.get_pixel_values(self.xray_surface_brightness_nosrc_filename)
def scale_map_region_index(self): #return fits.open(self.scale_map_region_file)[0].data return io.get_pixel_values(self.scale_map_region_file)
def temperature_map(self): return io.get_pixel_values(self.temperature_map_filename)