FROM TH2F
constant
0.014378617481090514+-0.016957958296412064
chi2/ndof = 0.003556171070310465
plane
0.030259711218712092+-0.11794368712896794
invpt slope = 0.003344050130561809+-0.014311577309338899
theta slope = -0.017659338072124837+-0.09777140283677016
chi2/ndof = 0.00189631020877055
from tgraph2D
constant
0.01660097181354503+-0.0010064276960043929
chi2/ndof = 5.570931890055096e-05
plane
0.030297917807360904+-0.0050537244750198254
invpt slope = 0.003911686840536698+-0.0006437640425804885
theta slope = -0.01745534345966868+-0.004413031662709497
chi2/ndof = 3.148570621404134e-05