FROM TH2F
constant
0.009248075196428838+-0.013466061333740117
chi2/ndof = 0.029837136595740724
plane
0.0133454632037035+-0.04276122274899518
invpt slope = 0.012093704097978015+-0.02226114877724299
theta slope = -0.01653938021840865+-0.05209668721212612
chi2/ndof = 0.0203659232227032
from tgraph2D
constant
0.03142363321431249+-0.004086691055006282
chi2/ndof = 0.0010855678455243215
plane
-0.0026247761503738337+-0.0037194339021162067
invpt slope = 0.03221885354893175+-0.002368850048372026
theta slope = 0.010056792289633448+-0.006914414110760054
chi2/ndof = 0.00024149342579388007