FROM TH2F
constant
0.7248886626752861+-0.10642549210070278
chi2/ndof = 0.3669196754113528
plane
3.8980988144534052+-0.8226067464441894
invpt slope = -0.0884004799468043+-0.09145273926961667
theta slope = -2.3115066187944278+-0.6268773230082275
chi2/ndof = 0.12924657316934912
from tgraph2D
constant
1.062067125369481+-0.04532459341323308
chi2/ndof = 0.14380231382687436
plane
2.8962840264684555+-0.2444355270463062
invpt slope = 0.023351153069937874+-0.02572765100294706
theta slope = -1.5712223747159495+-0.19646171226617787
chi2/ndof = 0.0746401195915514