subtract 10%iles      0.00000  0.000316115    0.0395846    0.0900321
     0.152206     0.240718     0.369365     0.576535      1.02899
diff 10%iles    -0.369480    -0.152673   -0.0636594   -0.0140228      0.00000
    0.0119946    0.0597785     0.146520     0.363391
stardiff 10%iles   -0.0537039   -0.0182516  -0.00469311      0.00000
   0.00123536   0.00831632    0.0175773    0.0323991    0.0658174
stardiff contour -excluded 0.005   -0.0537039    0.0658174