FROM TH2F
constant
13.525615656579358+-0.4914558482117348
chi2/ndof = 32.735979953683
plane
27.02739044406214+-5.64308340924448
invpt slope = -5.843958997020384+-0.2920408944224771
theta slope = 7.338185153731584+-4.457080941905971
chi2/ndof = 26.174734078127457
from tgraph2D
constant
46.13497429533912+-5.1061043731246585
chi2/ndof = 1642.5550237011826
plane
-12.151159522197354+-53.89817531188127
invpt slope = -5.491056810808162+-2.0021769332750723
theta slope = 56.73036258479547+-41.943444180994014
chi2/ndof = 1482.6483081732697