FROM TH2F
constant
0.03469316540307805+-0.021365603626155593
chi2/ndof = 0.011521729020306336
plane
0.05344093820894977+-0.05596165197573819
invpt slope = -0.012002453333622367+-0.029086314108166204
theta slope = -0.004367434211083373+-0.06216957006062832
chi2/ndof = 0.009117199573724227
from tgraph2D
constant
0.04425858608098389+-0.0010702732864307548
chi2/ndof = 0.00010767558131842959
plane
0.0409328385977978+-0.002039814302555769
invpt slope = 0.006449043404355618+-0.0013060750439259194
theta slope = -0.003537035513095291+-0.0024321598454668746
chi2/ndof = 8.642396243187424e-05