FROM TH2F
constant
0.020532081241863304+-0.015362321891661293
chi2/ndof = 0.011089042938088909
plane
0.0033170441549660104+-0.035883792503384755
invpt slope = 0.01675882071543022+-0.018001878632158536
theta slope = -8.120384433803348e-05+-0.052566792321412516
chi2/ndof = 0.0010168809979064018
from tgraph2D
constant
0.027938531836477407+-0.002019964309734067
chi2/ndof = 0.0004161860928663672
plane
0.003677001999184438+-0.001534938303813383
invpt slope = 0.017731107696715064+-0.0006344524602633642
theta slope = -0.0004341447649018164+-0.002327960046750767
chi2/ndof = 4.718472608390442e-05