FROM TH2F
constant
0.024829002236653526+-0.017508023641548034
chi2/ndof = 0.012244429624121464
plane
0.06422259867431371+-0.10069366115734096
invpt slope = 0.009863647079566632+-0.01461419749316103
theta slope = -0.04832417014341114+-0.08656111809724083
chi2/ndof = 0.002702953863510373
from tgraph2D
constant
0.03447586887474986+-0.002277311774033174
chi2/ndof = 0.00045638110463871854
plane
0.07782564119214701+-0.005702945718493561
invpt slope = 0.011065659770226551+-0.0008270812858714166
theta slope = -0.06155879297529525+-0.005295117808029335
chi2/ndof = 0.00010594921231348442