FROM TH2F
constant
0.02866159389344831+-0.020682963611852536
chi2/ndof = 0.005653738057008853
plane
0.050197663907246885+-0.13570063786670317
invpt slope = 0.008514675833695718+-0.018655193147026097
theta slope = -0.029112016660201696+-0.1130603649763807
chi2/ndof = 0.0020289885182072373
from tgraph2D
constant
0.0325254349225882+-0.0017568375216439863
chi2/ndof = 0.00022531289965303103
plane
0.06646940871246196+-0.00578046742186298
invpt slope = 0.008339105776812393+-0.0008228235325834359
theta slope = -0.041120162997247536+-0.004799411494749677
chi2/ndof = 7.031547029040531e-05