subtract 10%iles      0.00000    0.0115715    0.0672197     0.126275
     0.196019     0.286596     0.418251     0.642551      1.17454
stardiff 10%iles    -0.306552    -0.140500   -0.0677941   -0.0214659
      0.00000   0.00625577    0.0525361     0.127719     0.299460
stardiff contour -excluded 0.005    -0.306552     0.299460