FROM TH2F
constant
9.776592136690141+-0.3737186133611085
chi2/ndof = 2.0131066466498537
plane
7.298710141780543+-0.9826678091108502
invpt slope = -0.21744399404572057+-0.5753976020714197
theta slope = 5.3519998875602415+-1.2158430535196325
chi2/ndof = 1.7828583706611063
from tgraph2D
constant
11.675674149143873+-0.8257791840640989
chi2/ndof = 58.64436851366761
plane
5.38847163037051+-1.57657380334162
invpt slope = 0.20768220751332467+-0.92211325882735
theta slope = 11.403224416891774+-2.1543900188091087
chi2/ndof = 44.785242382195406