subtract 10%iles      0.00000   0.00130690    0.0309660    0.0679290
     0.117707     0.187426     0.294166     0.482607     0.940933
stardiff 10%iles    -0.452522    -0.184421   -0.0756881   -0.0147090
      0.00000    0.0162884    0.0764313     0.183795     0.451046
stardiff contour -excluded 0.005    -0.452522     0.451045