FROM TH2F
constant
0.02547266942908192+-0.020434890381570488
chi2/ndof = 0.010779111566424839
plane
0.07218189833018585+-0.14121227390754112
invpt slope = -0.00040148167831785477+-0.01658828369785003
theta slope = -0.04052426681261766+-0.11903951586980172
chi2/ndof = 0.009150858540650446
from tgraph2D
constant
0.03400770829102498+-0.0021024482760146207
chi2/ndof = 0.00029615934648063324
plane
0.07245149404233164+-0.008348596236293469
invpt slope = 0.008300070993695532+-0.0011883330306674508
theta slope = -0.04794432783342857+-0.007259481657852724
chi2/ndof = 0.00012198998683387063