subtract 10%iles      0.00000   0.00178976    0.0423472    0.0978560
     0.168209     0.260350     0.390299     0.598304      1.05485
stardiff 10%iles    -0.598537    -0.247346    -0.101595   -0.0186254
      0.00000    0.0222693     0.105154     0.250793     0.601676
stardiff contour -excluded 0.005    -0.598537     0.601675