subtract 10%iles      0.00000    0.0166432    0.0891583     0.174629
     0.285048     0.440284     0.680755      1.11114      2.09961
stardiff 10%iles    -0.405684    -0.177399   -0.0801914   -0.0212959
      0.00000    0.0102466    0.0666490     0.161995     0.391048
stardiff contour -excluded 0.005    -0.405684     0.391048