FROM TH2F
constant
0.015063134036457945+-0.014267300551774206
chi2/ndof = 0.01919755179967047
plane
0.10824232885432582+-0.1244628137095251
invpt slope = -0.00015728785245905548+-0.00786753514855962
theta slope = -0.06920644822587457+-0.08787429680810913
chi2/ndof = 0.010912045561180087
from tgraph2D
constant
0.03386962088564168+-0.0036714729006539506
chi2/ndof = 0.0010783770608637985
plane
0.07159459872561921+-0.01835818523782414
invpt slope = 0.004070830677340309+-0.0012804809987120864
theta slope = -0.0423125357212704+-0.01286372881797066
chi2/ndof = 0.0007412164480939812