subtract 10%iles      0.00000    0.0100842     0.109759     0.207362
     0.316480     0.452331     0.639869     0.940228      1.60094
stardiff 10%iles    -0.389713    -0.185612   -0.0895520   -0.0234412
      0.00000    0.0186689    0.0836015     0.178476     0.380630
stardiff contour -excluded 0.005    -0.389713     0.380629