FROM TH2F
constant
0.05414672990189537+-0.015343420893805236
chi2/ndof = 0.021569127210063484
plane
0.0176055760045654+-0.03784267392552729
invpt slope = 0.01344902302498794+-0.007531652442381552
theta slope = 0.004854536387112968+-0.04321839259282819
chi2/ndof = 0.007694884500107604
from tgraph2D
constant
0.07183549455262314+-0.0028316824177640086
chi2/ndof = 0.001988569478938906
plane
0.015348510199329613+-0.003640104491869153
invpt slope = 0.017046695816579714+-0.0006269896841709063
theta slope = 0.001695569744150775+-0.003965294364033852
chi2/ndof = 0.0004989868481889493