FROM TH2F
constant
0.026499945823287834+-0.013660868823867505
chi2/ndof = 0.0783063629787919
plane
0.15256078737232104+-0.0843788804070333
invpt slope = 0.0025175575946885485+-0.005388610984503218
theta slope = -0.10983460575353905+-0.06430363218276025
chi2/ndof = 0.05187397462776351
from tgraph2D
constant
0.1017496418264551+-0.0090525615860069
chi2/ndof = 0.01278402392518688
plane
0.23480538016285454+-0.029798284971923137
invpt slope = 0.01148273536364822+-0.0023595221609698587
theta slope = -0.17949736884414935+-0.024522528152445437
chi2/ndof = 0.007578124558954728