FROM TH2F
constant
8.638782498869627+-0.47679805089583666
chi2/ndof = 108.96192813589863
plane
-62.44172681329076+-2.17710368759672
invpt slope = -16.95882943947422+-0.6201428154849593
theta slope = 114.04451993349574+-3.189217789344665
chi2/ndof = 78.65185563353872
from tgraph2D
constant
117.06714497357706+-11.407109862535256
chi2/ndof = 5465.130525500884
plane
-90.56909635673233+-72.48619202705517
invpt slope = -16.081895108311105+-8.203952418941356
theta slope = 196.1692637345667+-61.14695655899903
chi2/ndof = 4366.779846968508