subtract 10%iles      0.00000  0.000117499    0.0344334    0.0819197
     0.146211     0.233505     0.358636     0.560900      1.00284
stardiff 10%iles    -0.569806    -0.232600   -0.0939151   -0.0179932
      0.00000    0.0210057    0.0968592     0.235168     0.571360
stardiff contour -excluded 0.005    -0.569806     0.571360