FROM TH2F
constant
10.265056667097637+-0.36277167789079784
chi2/ndof = 0.38070439395918027
plane
6.6516121286293215+-0.9173589710894993
invpt slope = 1.5427340579869067+-0.448152966190912
theta slope = 3.1096579460497678+-1.2082096914077152
chi2/ndof = 0.13788714004353606
from tgraph2D
constant
10.364154254293533+-0.2188741027035717
chi2/ndof = 4.503152046073406
plane
7.3169357604509955+-0.30144538590329717
invpt slope = 1.3726136498869472+-0.14703397186065273
theta slope = 2.8019790080442304+-0.43493016596463885
chi2/ndof = 1.7842522912196637