subtract 10%iles      0.00000   0.00110197    0.0236936    0.0505215
    0.0828358     0.125360     0.187799     0.295941     0.566901
stardiff 10%iles    -0.336564    -0.131118   -0.0542241   -0.0111859
      0.00000    0.0128256    0.0568377     0.135037     0.342489
stardiff contour -excluded 0.005    -0.336564     0.342488