subtract 10%iles      0.00000    0.0213361    0.0970950     0.177619
     0.274261     0.405375     0.605487     0.959244      1.80959
stardiff 10%iles    -0.379947    -0.171171   -0.0816979   -0.0250312
      0.00000   0.00844741    0.0649922     0.157019     0.372092
stardiff contour -excluded 0.005    -0.379947     0.372092