FROM TH2F
constant
0.02291926994478084+-0.01849536849854084
chi2/ndof = 0.011706349582122185
plane
0.03873888348081913+-0.09920725000566874
invpt slope = 0.00826936555347905+-0.01860757796292503
theta slope = -0.022731153668602785+-0.08753299394683431
chi2/ndof = 0.008568983440122998
from tgraph2D
constant
0.031318959570591255+-0.0023934565075665725
chi2/ndof = 0.0004296475540062183
plane
0.03544790659737622+-0.008073130700903314
invpt slope = 0.014496372485498987+-0.001704924251534387
theta slope = -0.021476736884786504+-0.007123807312128539
chi2/ndof = 0.00021654662228740568