FROM TH2F
constant
0.01617039722764458+-0.021494449267396156
chi2/ndof = 0.002588061780432504
plane
0.0272288743275317+-0.15168526323658946
invpt slope = -0.0009134112940607497+-0.025350930669813903
theta slope = -0.008325446107405718+-0.12246400674120544
chi2/ndof = 0.0025769368665573143
from tgraph2D
constant
0.018010863374364267+-0.0011287923958784093
chi2/ndof = 4.8418546373803585e-05
plane
0.03418511991517163+-0.006916589976222779
invpt slope = 0.0010234353079187795+-0.0011581034414575708
theta slope = -0.015427939713751261+-0.0055987935822698395
chi2/ndof = 4.054665036626503e-05