FROM TH2F
constant
0.019166917544381493+-0.01787312579552699
chi2/ndof = 0.014886978559490822
plane
0.043854078652133616+-0.11427814116533752
invpt slope = 0.010524596446523126+-0.018697240190926338
theta slope = -0.03261717538335952+-0.09250578090256216
chi2/ndof = 0.0062294716482672345
from tgraph2D
constant
0.03178513849133945+-0.0029098809058829044
chi2/ndof = 0.0005419140407147091
plane
0.0850363713560418+-0.009744307883662354
invpt slope = 0.011339368680199503+-0.0017337095215337545
theta slope = -0.06691863194372105+-0.008331702876943051
chi2/ndof = 0.00019659105880714197