FROM TH2F
constant
0.01275237508346026+-0.011773392562897536
chi2/ndof = 0.013386881711245637
plane
0.050033679233545784+-0.11884410955872547
invpt slope = 0.0034479667260423185+-0.005278147225144021
theta slope = -0.03563119605648368+-0.09212747801743555
chi2/ndof = 0.00505165998544231
from tgraph2D
constant
0.02496395308401057+-0.001484562446841493
chi2/ndof = 0.00021157686322451874
plane
0.05847986104078166+-0.009038175904122989
invpt slope = 0.004234466772072018+-0.00045281980483611266
theta slope = -0.041390893677230756+-0.007519918338518433
chi2/ndof = 9.578676916079255e-05