FROM TH2F
constant
0.017663445082636117+-0.017603550824823788
chi2/ndof = 0.009698320600154294
plane
0.06380456381639636+-0.12310185856150856
invpt slope = 0.006999384253098463+-0.016551263193456046
theta slope = -0.04697146329936054+-0.10141430786076425
chi2/ndof = 0.002472142345297556
from tgraph2D
constant
0.025214869095343873+-0.002117413745825632
chi2/ndof = 0.00027797334018853445
plane
0.08481924447769196+-0.005792723887252467
invpt slope = 0.006866581504567721+-0.0009453752705239107
theta slope = -0.06430319425467038+-0.005174082512598639
chi2/ndof = 6.86676678162943e-05