subtract 10%iles      0.00000    0.0115771    0.0639154     0.122261
     0.195043     0.297870     0.466443     0.786016      1.56686
diff 10%iles    -0.391807    -0.156095   -0.0642638   -0.0143888      0.00000
    0.0132742    0.0641880     0.158361     0.398367
stardiff 10%iles   -0.0542490   -0.0184576  -0.00545355      0.00000
  0.000826851   0.00806305    0.0173502    0.0326084    0.0706022
stardiff contour -excluded 0.005   -0.0542490    0.0706021