FROM TH2F
constant
32.67725153607618+-0.609370499189818
chi2/ndof = 34.11743936683679
plane
-3.5512647358781173+-4.2624421041516865
invpt slope = -7.4013858011491145+-0.3664360766487947
theta slope = 58.13398954152662+-3.83617159656193
chi2/ndof = 27.751317214027516
from tgraph2D
constant
67.39706919575167+-3.30646065545298
chi2/ndof = 1005.8067506998731
plane
131.85466091938378+-18.324329880421384
invpt slope = -6.931045711021959+-1.8771958072525583
theta slope = -40.95589124705782+-15.690800231584253
chi2/ndof = 833.0599421303606