subtract 10%iles      0.00000  0.000515766    0.0411972    0.0862871
     0.140022     0.208636     0.304535     0.461864     0.830796
stardiff 10%iles    -0.465863    -0.184939   -0.0759751   -0.0154534
      0.00000    0.0189022    0.0812056     0.191786     0.474274
stardiff contour -excluded 0.005    -0.465863     0.474273