subtract 10%iles      0.00000    0.0234461     0.110041     0.202661
     0.314674     0.465178     0.692366      1.09025      2.02709
stardiff 10%iles    -0.412497    -0.187914   -0.0901484   -0.0283515
      0.00000   0.00725743    0.0660740     0.161642     0.386674
stardiff contour -excluded 0.005    -0.412497     0.386673