FROM TH2F
constant
0.021597393329321056+-0.01622907407877681
chi2/ndof = 0.010039429409354764
plane
0.05286653020589027+-0.09489062949011424
invpt slope = 0.008583085366095325+-0.013802948641638394
theta slope = -0.036559721812349726+-0.07881975863365327
chi2/ndof = 0.0032758701331722854
from tgraph2D
constant
0.029109962675584734+-0.0018432949587342293
chi2/ndof = 0.00030579626744355265
plane
0.06660462860753559+-0.005061881373599992
invpt slope = 0.00919738418362586+-0.000863371903748333
theta slope = -0.047647295099470195+-0.004528036057085397
chi2/ndof = 0.00010088814723297088