FROM TH2F
constant
0.03571657298827338+-0.018101794978277422
chi2/ndof = 0.02002090219310255
plane
-0.005922805792543678+-0.12447437307678541
invpt slope = 0.011485991195610964+-0.009651111094626066
theta slope = 0.0124442183404286+-0.10461817477152818
chi2/ndof = 0.006092092945753882
from tgraph2D
constant
0.05381650499097165+-0.0036987577389032463
chi2/ndof = 0.001559612204776371
plane
-0.014830581530350682+-0.013336974750909903
invpt slope = 0.014698143341889958+-0.0008699364122636388
theta slope = 0.015860674158864867+-0.011055348313924825
chi2/ndof = 0.0004160308514827142