The following figures can be found in $AST_DOCS as postscript files.
figure 1. "PSPC image" user_005_impspc.ps_tex
figure 2. "HRI image" user_005_imhri.ps_tex
figure 3. "Background extraction technique" user_005_srcblk.ps_tex
figure 4. "HRI detector efficiency" user_005_hriqeff.ps_tex
figure 5. "Vignetting curves at 0,15,30,45 arcminutes of-axis" user_005_angvig.ps_tex
figure 6. "Vignetting at diff. energies" user_005_envig.ps_tex