subtract 10%iles      0.00000    0.0165195     0.100550     0.188996
     0.303139     0.467797     0.723051      1.16502      2.15769
diff 10%iles    -0.491245    -0.207542   -0.0890608   -0.0195966      0.00000
    0.0184093    0.0858583     0.202757     0.484716
stardiff 10%iles   -0.0681961   -0.0248951  -0.00755757      0.00000
  0.000842065    0.0102372    0.0217827    0.0398161    0.0814274
stardiff contour -excluded 0.005   -0.0681961    0.0814272