FROM TH2F
constant
0.02759797863410569+-0.016867579656829862
chi2/ndof = 0.016178160615097543
plane
0.07926282004200523+-0.10137783906176985
invpt slope = 0.009917249994510336+-0.010979745463003777
theta slope = -0.06044964466695428+-0.08687004968832553
chi2/ndof = 0.0037204859479812056
from tgraph2D
constant
0.04128360871135897+-0.0029096975487283177
chi2/ndof = 0.0008720330019089139
plane
0.10870583983035274+-0.008917585086316484
invpt slope = 0.011894876602987641+-0.0010783088166408214
theta slope = -0.08940220013010262+-0.008324768259054637
chi2/ndof = 0.0003030183887638179