FROM TH2F
constant
0.02280351586691275+-0.015917675663744284
chi2/ndof = 0.004938137645898042
plane
0.009585057890517801+-0.0391048912821807
invpt slope = 0.011932313736000353+-0.018673440487559152
theta slope = -0.000748488111706749+-0.04902223597896003
chi2/ndof = 0.00034487822059233304
from tgraph2D
constant
0.02518020124991399+-0.0011827159834532823
chi2/ndof = 0.00014827461233932074
plane
0.010121082467562827+-0.0007373024759461472
invpt slope = 0.01162011660062997+-0.0003226472208710833
theta slope = 0.00014533308099690627+-0.000997641971345607
chi2/ndof = 1.1151010528621117e-05