FROM TH2F
constant
7.0653956555289215+-0.2545980043361911
chi2/ndof = 1.296692299502717
plane
21.046177353793457+-1.4551511078628911
invpt slope = -0.658418856481617+-0.16635930700319113
theta slope = -10.32224674242458+-1.1666687449923114
chi2/ndof = 0.4109338240843899
from tgraph2D
constant
8.3592581748843+-0.32683091524052127
chi2/ndof = 12.284121469135876
plane
23.170157202702132+-0.7690198554900187
invpt slope = -0.629947383263552+-0.09966275957409121
theta slope = -11.96214502354318+-0.6576933198638559
chi2/ndof = 2.7977330867531207