FROM TH2F
constant
0.010901623276926365+-0.018175594089941172
chi2/ndof = 0.0025921046197244406
plane
0.047064984336524895+-0.2514184963840808
invpt slope = -0.0019209358203778107+-0.014634775304618633
theta slope = -0.024692145523907104+-0.20732853993960315
chi2/ndof = 0.001084671047342771
from tgraph2D
constant
0.013150011319326074+-0.0008538362653741776
chi2/ndof = 2.6974345618467537e-05
plane
0.046711595568715965+-0.007698471810597283
invpt slope = -0.0013136938162733067+-0.00044562817582512166
theta slope = -0.024972273364285195+-0.006210566317387265
chi2/ndof = 1.542433425903623e-05