FROM TH2F
constant
0.027806902221604896+-0.029028148418630818
chi2/ndof = 0.005325774689268848
plane
0.06967110568527003+-0.2873256664343644
invpt slope = 0.007870596061989357+-0.03555810239524176
theta slope = -0.04784183401697204+-0.23146858629380015
chi2/ndof = 0.0009175407035156624
from tgraph2D
constant
0.03178304492964182+-0.002204120426326431
chi2/ndof = 0.00017003513988181568
plane
0.08036374465947463+-0.008040612116611182
invpt slope = 0.006808031154714237+-0.0011089016697679987
theta slope = -0.055100265127555205+-0.0066107498785519065
chi2/ndof = 3.2170268119207485e-05