subtract 10%iles      0.00000    0.0128040    0.0981710     0.188461
     0.304131     0.471203     0.729476      1.18207      2.20370
diff 10%iles    -0.522563    -0.219060   -0.0934777   -0.0222785      0.00000
    0.0170884    0.0874770     0.209642     0.507615
stardiff 10%iles   -0.0810617   -0.0310571   -0.0109318      0.00000
      0.00000   0.00894612    0.0214612    0.0413378    0.0865965
stardiff contour -excluded 0.005   -0.0810617    0.0865965