FROM TH2F
constant
0.02357458673518159+-0.01998922876530194
chi2/ndof = 0.006823575374582763
plane
0.062133879947622775+-0.12521667494667799
invpt slope = -0.0010557542132529237+-0.020216866012981102
theta slope = -0.033083267480751986+-0.10325141275424471
chi2/ndof = 0.0052303273652373255
from tgraph2D
constant
0.029615882050655264+-0.0017480241217018113
chi2/ndof = 0.00019861324145417864
plane
0.0801549894914553+-0.007198309581603716
invpt slope = 0.002594717674560343+-0.0011443965603838663
theta slope = -0.05112840636309929+-0.00629484313993028
chi2/ndof = 9.220678766701281e-05