FROM TH2F
constant
38.460133403680985+-0.5481512488884812
chi2/ndof = 13.325417908663644
plane
71.71600275081644+-2.9794434131442253
invpt slope = -1.7281623436181024+-0.27351110476658935
theta slope = -21.841461844123174+-2.5666462861693966
chi2/ndof = 12.196742792398563
from tgraph2D
constant
51.8066429876226+-2.105294390092492
chi2/ndof = 593.9234394397232
plane
88.90312632298776+-12.017607378259092
invpt slope = -0.47369480021220856+-0.9160125772949156
theta slope = -30.11456260349911+-10.232206850007376
chi2/ndof = 560.6011023559207