FROM TH2F
constant
0.01317019866103793+-0.019126914327159402
chi2/ndof = 0.0015153870976757973
plane
0.04718464792137396+-0.23643636689641062
invpt slope = 0.0012769007223907467+-0.01716277312544503
theta slope = -0.029004862981911784+-0.1883360360957392
chi2/ndof = 0.000762251905304482
from tgraph2D
constant
0.01433764890488209+-0.000626799566562415
chi2/ndof = 1.571510786570788e-05
plane
0.0414388451685545+-0.0055695116156361515
invpt slope = 0.0013410530869537012+-0.0003562004884314299
theta slope = -0.02390161054432885+-0.004548243116897404
chi2/ndof = 8.187911116276279e-06