FROM TH2F
constant
9.793797733448635+-0.3194037043104449
chi2/ndof = 3.8917169406338594
plane
10.168059300391699+-0.6979258155757345
invpt slope = -1.802407924842857+-0.2705566918320436
theta slope = 5.467494374903832+-1.2494590680921613
chi2/ndof = 3.4973677480152467
from tgraph2D
constant
13.079387491189912+-0.6233710919914196
chi2/ndof = 43.13365850322266
plane
8.561439700620936+-1.182463123678357
invpt slope = 0.2944863520488036+-0.5027467484554651
theta slope = 6.287948863152271+-2.01527658334502
chi2/ndof = 37.28897067055211