FROM TH2F
constant
0.02784095851375608+-0.02433846379095966
chi2/ndof = 0.006627396030646119
plane
0.040939135893625585+-0.1726566021735071
invpt slope = 0.008311649411799097+-0.02687902608576373
theta slope = -0.020845564266811185+-0.14956824072051966
chi2/ndof = 0.004406912468546056
from tgraph2D
constant
0.03194891809937864+-0.002372822887187019
chi2/ndof = 0.0002984052880613063
plane
0.050975453911602985+-0.012061692272048254
invpt slope = 0.010440089980419112+-0.0019181281246704511
theta slope = -0.029317661414782842+-0.010522249766333251
chi2/ndof = 0.00017952063710961888