subtract 10%iles      0.00000   0.00966549    0.0589750     0.113812
     0.180983     0.276514     0.432688     0.733080      1.46895
diff 10%iles    -0.353813    -0.141430   -0.0588517   -0.0136075      0.00000
    0.0117786    0.0578125     0.142386     0.358786
stardiff 10%iles   -0.0569271   -0.0194203  -0.00583624      0.00000
  0.000548154   0.00769434    0.0169192    0.0323418    0.0708232
stardiff contour -excluded 0.005   -0.0569271    0.0708231